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<li id="toc-Windows_Update_web_app" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Windows_Update_web_app"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Windows Update web app</span> </div> </a> <ul id="toc-Windows_Update_web_app-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Critical_Update_Notification_Utility" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Critical_Update_Notification_Utility"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Critical Update Notification Utility</span> </div> </a> <ul id="toc-Critical_Update_Notification_Utility-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Automatic_Updates" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Automatic_Updates"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Automatic Updates</span> </div> </a> <ul id="toc-Automatic_Updates-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Windows_Update_Agent" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Windows_Update_Agent"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Windows Update Agent</span> </div> </a> <ul id="toc-Windows_Update_Agent-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Windows_Update_for_Business" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Windows_Update_for_Business"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Windows Update for Business</span> </div> </a> <ul id="toc-Windows_Update_for_Business-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Complementary_software_and_services" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Complementary_software_and_services"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Complementary software and services</span> </div> </a> <button aria-controls="toc-Complementary_software_and_services-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Complementary software and services subsection</span> </button> <ul id="toc-Complementary_software_and_services-sublist" class="vector-toc-list"> <li id="toc-Third-party_services" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Third-party_services"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Third-party services</span> </div> </a> <ul id="toc-Third-party_services-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Service" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Service"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Service</span> </div> </a> <button aria-controls="toc-Service-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Service subsection</span> </button> <ul id="toc-Service-sublist" class="vector-toc-list"> <li id="toc-Microsoft_Update" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Microsoft_Update"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Microsoft Update</span> </div> </a> <ul id="toc-Microsoft_Update-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Command_Line_Updates_Tools" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Command_Line_Updates_Tools"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Command Line Updates Tools</span> </div> </a> <ul id="toc-Command_Line_Updates_Tools-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Office_Update" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Office_Update"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Office Update</span> </div> </a> <ul id="toc-Office_Update-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span 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Available in 38 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-38" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">38 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%88%D9%8A%D9%86%D8%AF%D9%88%D8%B2_%D8%A3%D8%A8%D8%AF%D9%8A%D8%AA" title="ويندوز أبديت – Arabic" lang="ar" hreflang="ar" data-title="ويندوز أبديت" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%89%E0%A6%87%E0%A6%A8%E0%A7%8D%E0%A6%A1%E0%A7%8B%E0%A6%9C_%E0%A6%86%E0%A6%AA%E0%A6%A1%E0%A7%87%E0%A6%9F" title="উইন্ডোজ আপডেট – Bangla" lang="bn" hreflang="bn" data-title="উইন্ডোজ আপডেট" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/Windows_Update" title="Windows Update – Bulgarian" lang="bg" hreflang="bg" data-title="Windows Update" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Windows_Update" title="Windows Update – Bosnian" lang="bs" hreflang="bs" data-title="Windows Update" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Windows_Update" title="Windows Update – Catalan" lang="ca" hreflang="ca" data-title="Windows Update" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Windows_Update" title="Windows Update – Czech" lang="cs" hreflang="cs" data-title="Windows Update" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Microsoft_Update" title="Microsoft Update – German" lang="de" hreflang="de" data-title="Microsoft Update" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Windows_Update" title="Windows Update – Estonian" lang="et" hreflang="et" data-title="Windows Update" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/Windows_Update" title="Windows Update – Greek" lang="el" hreflang="el" data-title="Windows Update" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Windows_Update" title="Windows Update – Spanish" lang="es" hreflang="es" data-title="Windows Update" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D9%87%E2%80%8C%D8%B1%D9%88%D8%B2%D8%B1%D8%B3%D8%A7%D9%86%DB%8C_%D9%88%DB%8C%D9%86%D8%AF%D9%88%D8%B2" title="به‌روزرسانی ویندوز – Persian" lang="fa" hreflang="fa" data-title="به‌روزرسانی ویندوز" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Windows_Update" title="Windows Update – French" lang="fr" hreflang="fr" data-title="Windows Update" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9C%88%EB%8F%84%EC%9A%B0_%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8" title="윈도우 업데이트 – Korean" lang="ko" hreflang="ko" data-title="윈도우 업데이트" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Windows_Update" title="Windows Update – Croatian" lang="hr" hreflang="hr" data-title="Windows Update" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Windows_Update" title="Windows Update – Indonesian" lang="id" hreflang="id" data-title="Windows Update" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Windows_Update" title="Windows Update – Italian" lang="it" hreflang="it" data-title="Windows Update" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/Windows_Update" title="Windows Update – Hebrew" lang="he" hreflang="he" data-title="Windows Update" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/Windows_Update" title="Windows Update – Kazakh" lang="kk" hreflang="kk" data-title="Windows Update" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Windows_Update" title="Windows Update – Hungarian" lang="hu" hreflang="hu" data-title="Windows Update" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B5%E0%B4%BF%E0%B5%BB%E0%B4%A1%E0%B5%8B%E0%B4%B8%E0%B5%8D_%E0%B4%85%E0%B4%AA%E0%B5%8D%E0%B4%A1%E0%B5%87%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B5%8D" title="വിൻഡോസ് അപ്ഡേറ്റ് – Malayalam" lang="ml" hreflang="ml" data-title="വിൻഡോസ് അപ്ഡേറ്റ്" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%82%E0%A4%A1%E0%A5%8B%E0%A4%9C_%E0%A4%85%E0%A4%AA%E0%A4%A1%E0%A5%87%E0%A4%9F" title="विंडोज अपडेट – Marathi" lang="mr" hreflang="mr" data-title="विंडोज अपडेट" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Windows_Update" title="Windows Update – Dutch" lang="nl" hreflang="nl" data-title="Windows Update" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Microsoft_Update" title="Microsoft Update – Japanese" lang="ja" hreflang="ja" data-title="Microsoft Update" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Windows_Update" title="Windows Update – Polish" lang="pl" hreflang="pl" data-title="Windows Update" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Windows_Update" title="Windows Update – Portuguese" lang="pt" hreflang="pt" data-title="Windows Update" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Windows_Update" title="Windows Update – Romanian" lang="ro" hreflang="ro" data-title="Windows Update" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A6%D0%B5%D0%BD%D1%82%D1%80_%D0%BE%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F_Windows" title="Центр обновления Windows – Russian" lang="ru" hreflang="ru" data-title="Центр обновления Windows" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Windows_Update" title="Windows Update – Albanian" lang="sq" hreflang="sq" data-title="Windows Update" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%80%E0%B7%92%E0%B6%B1%E0%B7%8A%E0%B6%A9%E0%B7%9D%E0%B7%83%E0%B7%8A_%E0%B6%85%E0%B6%B4%E0%B7%8A%E0%B6%A9%E0%B7%9A%E0%B6%A7%E0%B7%8A" title="වින්ඩෝස් අප්ඩේට් – Sinhala" lang="si" hreflang="si" data-title="වින්ඩෝස් අප්ඩේට්" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Windows_Update" title="Windows Update – Simple English" lang="en-simple" hreflang="en-simple" data-title="Windows Update" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Windows_Update" title="Windows Update – Serbian" lang="sr" hreflang="sr" data-title="Windows Update" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Windows_Update" title="Windows Update – Finnish" lang="fi" hreflang="fi" data-title="Windows Update" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Microsoft_Update" title="Microsoft Update – Swedish" lang="sv" hreflang="sv" data-title="Microsoft Update" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Windows_Update" title="Windows Update – Turkish" lang="tr" hreflang="tr" data-title="Windows Update" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Windows_Update" title="Windows Update – Ukrainian" lang="uk" hreflang="uk" data-title="Windows Update" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Windows_Update" title="Windows Update – Vietnamese" lang="vi" hreflang="vi" data-title="Windows Update" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/Windows_Update" title="Windows Update – Cantonese" lang="yue" hreflang="yue" data-title="Windows Update" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Windows_Update" title="Windows Update – Chinese" lang="zh" hreflang="zh" data-title="Windows Update" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div 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dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Software update distribution service for Microsoft Windows</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Windows Update</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span typeof="mw:File"><a href="/wiki/File:Windows_Update_Icon_2022.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/1/17/Windows_Update_Icon_2022.png/60px-Windows_Update_Icon_2022.png" decoding="async" width="60" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/17/Windows_Update_Icon_2022.png/120px-Windows_Update_Icon_2022.png 1.5x" data-file-width="200" data-file-height="200" /></a></span></td></tr><tr><td colspan="2" class="infobox-image logo"><span typeof="mw:File"><a href="/wiki/File:Windows_Update_screenshot.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/2/2f/Windows_Update_screenshot.png/300px-Windows_Update_screenshot.png" decoding="async" width="300" height="206" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/2/2f/Windows_Update_screenshot.png 1.5x" data-file-width="382" data-file-height="262" /></a></span><div class="infobox-caption">Windows Update on <a href="/wiki/Windows_11" title="Windows 11">Windows 11</a></div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Other names</th><td class="infobox-data">Microsoft Update</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Microsoft" title="Microsoft">Microsoft</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"> <ul><li><a href="/wiki/Windows_9x" title="Windows 9x">Windows 9x</a> family</li> <li><a href="/wiki/Windows_NT" title="Windows NT">Windows NT</a> family</li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Included with</th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"> <ul><li><a href="/wiki/Windows_Vista" title="Windows Vista">Windows Vista</a> and later</li> <li><a href="/wiki/Windows_Server_2008" title="Windows Server 2008">Windows Server 2008</a> and later</li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Service name</th><td class="infobox-data">Windows Update</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Network_service" title="Network service">Network service</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://support.microsoft.com/en-us/windows/windows-update-faq-8a903416-6f45-0718-f5c7-375e92dddeb2">support.microsoft.com/en-us/windows/windows-update-faq</a></span></td></tr></tbody></table> <p><b>Windows Update</b> is a <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a> service for the <a href="/wiki/Windows_9x" title="Windows 9x">Windows 9x</a> and <a href="/wiki/Windows_NT" title="Windows NT">Windows NT</a> families of the <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a> operating system, which automates downloading and installing Microsoft Windows <a href="/wiki/Software_update" class="mw-redirect" title="Software update">software updates</a> over the <a href="/wiki/Internet" title="Internet">Internet</a>. The service delivers software updates for Windows, as well as the various Microsoft <a href="/wiki/Antivirus_software" title="Antivirus software">antivirus products</a>, including <a href="/wiki/Windows_Defender" class="mw-redirect" title="Windows Defender">Windows Defender</a> and <a href="/wiki/Microsoft_Security_Essentials" title="Microsoft Security Essentials">Microsoft Security Essentials</a>. Since its inception, Microsoft has introduced two extensions of the service: <b>Microsoft Update</b> and <b>Windows Update for Business</b>. The former expands the core service to include other Microsoft products, such as <a href="/wiki/Microsoft_Office" title="Microsoft Office">Microsoft Office</a> and <a href="/wiki/Microsoft_Expression_Studio" title="Microsoft Expression Studio">Microsoft Expression Studio</a>. The latter is available to business editions of <a href="/wiki/Windows_10" title="Windows 10">Windows 10</a> and permits postponing updates or receiving updates only after they have undergone rigorous testing. </p><p>As the service has evolved over the years, so has its client software. For a decade, the primary client component of the service was the Windows Update <a href="/wiki/Web_app" class="mw-redirect" title="Web app">web app</a> that could only be run on <a href="/wiki/Internet_Explorer" title="Internet Explorer">Internet Explorer</a>. Starting with <a href="/wiki/Windows_Vista" title="Windows Vista">Windows Vista</a>, the primary client component became Windows Update Agent, an integral component of the operating system. </p><p>The service provides several kinds of updates. <i>Security updates</i> or <i>critical updates</i> mitigate vulnerabilities and <a href="/wiki/Exploit_(computer_security)" title="Exploit (computer security)">security exploits</a> in Microsoft Windows. <i>Cumulative updates</i> are updates that bundle multiple updates, both new and previously released updates. Cumulative updates were introduced with Windows 10 and only some been backported to <a href="/wiki/Windows_7" title="Windows 7">Windows 7</a> and <a href="/wiki/Windows_8.1" title="Windows 8.1">Windows 8.1</a>. Windows 11 24H2 also introduced checkpoint cumulative updates<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and updates with Hotpatch capability in the name, where some of the updates no longer require a reboot. <sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Microsoft routinely releases updates on the second Tuesday of each month (known as the <a href="/wiki/Patch_Tuesday" title="Patch Tuesday">Patch Tuesday</a> B updates) but can provide them whenever a new update is urgently required to prevent a newly discovered or prevalent exploit, so-called out-of-band updates.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> System administrators can configure Windows Update to install critical updates for Microsoft Windows automatically, so long as the computer has an Internet connection. </p><p>In Windows 10 and <a href="/wiki/Windows_11" title="Windows 11">Windows 11</a>, the use of Windows Update is mandatory; however, the software agreement states that users may stop receiving updates on their device by disconnecting their device from the Internet.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p><p>There also exist C and D updates,<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> that users enroll in when they click the update button.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Clients">Clients</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=1" title="Edit section: Clients"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Windows_Update_web_app">Windows Update web app</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=2" title="Edit section: Windows Update web app"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Win_Update_ME.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/d/d9/Win_Update_ME.png/250px-Win_Update_ME.png" decoding="async" width="220" height="144" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/d/d9/Win_Update_ME.png/330px-Win_Update_ME.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/d/d9/Win_Update_ME.png/500px-Win_Update_ME.png 2x" data-file-width="632" data-file-height="414" /></a><figcaption>The Windows Update web app, version 4, in <a href="/wiki/Windows_Me" title="Windows Me">Windows Me</a></figcaption></figure> <p>Windows Update was introduced as a <a href="/wiki/Web_app" class="mw-redirect" title="Web app">web app</a> with the launch of <a href="/wiki/Windows_98" title="Windows 98">Windows 98</a> and offered additional <a href="/wiki/Theme_(computing)" title="Theme (computing)">desktop themes</a>, <a href="/wiki/Video_game" title="Video game">games</a>, <a href="/wiki/Device_driver" title="Device driver">device driver</a> updates, and optional components such as <a href="/wiki/NetMeeting" class="mw-redirect" title="NetMeeting">NetMeeting</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Windows_95" title="Windows 95">Windows 95</a> and <a href="/wiki/Windows_NT_4.0" title="Windows NT 4.0">Windows NT 4.0</a> were retroactively given the ability to access the Windows Update website and download updates designed for those operating systems, starting with the release of <a href="/wiki/Internet_Explorer_4" title="Internet Explorer 4">Internet Explorer 4</a>. The initial focus of Windows Update was free add-ons and new technologies for Windows. Security fixes for <a href="/wiki/Outlook_Express" title="Outlook Express">Outlook Express</a>, Internet Explorer and other programs appeared later, as did access to beta versions of upcoming Microsoft software, e.g. <a href="/wiki/Internet_Explorer_5" title="Internet Explorer 5">Internet Explorer 5</a>. Fixes to Windows 98 to resolve the <a href="/wiki/Year_2000_problem" title="Year 2000 problem">Year 2000 problem</a> were distributed using Windows Update in December 1998. Microsoft attributed the sales success of Windows 98 in part to Windows Update.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p> The Windows Update web app requires either <a href="/wiki/Internet_Explorer" title="Internet Explorer">Internet Explorer</a> or a third-party <a href="/wiki/Web_browser" title="Web browser">web browser</a> that supports the <a href="/wiki/ActiveX" title="ActiveX">ActiveX</a> technology. The earliest version of the web app, version 3, does not send any personally identifiable information to Microsoft. Instead, the app downloads a full list of every available update and chooses which one to download and install. But the list grew so large that the performance impact of processing became a concern. Arie Slob, writing for the Windows-help.net newsletter in March 2003, noted that the size of the update list had exceeded <span class="nowrap">400 <a href="/wiki/Kilobyte" title="Kilobyte">KB</a></span>, which caused delays of more than a minute for <a href="/wiki/Dial-up_Internet_access" title="Dial-up Internet access">dial-up</a> users.<sup id="cite_ref-arieslob_11-0" class="reference"><a href="#cite_note-arieslob-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> Windows Update v4, released in 2001 in conjunction with <a href="/wiki/Windows_XP" title="Windows XP">Windows XP</a>, changed this. This version of the app makes an inventory of the system's hardware and Microsoft software and sends them to the service, thus offloading the processing burden to Microsoft <a href="/wiki/Server_(computing)" title="Server (computing)">servers</a>.<sup id="cite_ref-arieslob_11-1" class="reference"><a href="#cite_note-arieslob-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></p><div style="clear:both;" class=""></div> <div class="mw-heading mw-heading3"><h3 id="Critical_Update_Notification_Utility">Critical Update Notification Utility</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=3" title="Edit section: Critical Update Notification Utility"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Windows_98_-_Critical_Update_Notification.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/e/e7/Windows_98_-_Critical_Update_Notification.png/250px-Windows_98_-_Critical_Update_Notification.png" decoding="async" width="220" height="117" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/e/e7/Windows_98_-_Critical_Update_Notification.png/330px-Windows_98_-_Critical_Update_Notification.png 1.5x, //upload.wikimedia.org/wikipedia/en/e/e7/Windows_98_-_Critical_Update_Notification.png 2x" data-file-width="432" data-file-height="230" /></a><figcaption>Screenshot of the Critical Update Notification <a href="/wiki/Dialog_box" title="Dialog box">dialog box</a> in <a href="/wiki/Windows_98" title="Windows 98">Windows 98</a></figcaption></figure> <p><i>Critical Update Notification Utility</i> (initially <i>Critical Update Notification Tool</i>) is a <a href="/wiki/Background_process" title="Background process">background process</a> that checks the Windows Update website on a regular schedule for new updates that have been marked as "Critical." It was released shortly after Windows 98. </p><p>By default, this check occurs every five minutes, plus when Internet Explorer starts; however, the user could configure the next check to occur only at certain times of the day or on certain days of the week. The tool queries the Microsoft server for a file called "<code>cucif.cab</code>", which contained a list of all the critical updates released for the operating system. The tool then compares this list with the list of installed updates on its machine and displays an update availability notification. Once the check is executed, any custom schedule defined by the user is reverted to the default. Microsoft stated that this ensures that users receive notification of critical updates in a timely manner.<sup id="cite_ref-cun-kb_12-0" class="reference"><a href="#cite_note-cun-kb-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p>An analysis done by security researcher <a href="/wiki/H._D._Moore" title="H. D. Moore">H. D. Moore</a> in early 1999 was critical of this approach, describing it as "horribly inefficient" and susceptible to attacks. In a posting to <a href="/wiki/BugTraq" class="mw-redirect" title="BugTraq">BugTraq</a>, he explained that, "every single Windows 98 computer that wishes to get an update has to rely on a single host for the security. If that one server got compromised one day, or an attacker cracked the [Microsoft] DNS server again, there could be millions of users installing <a href="/wiki/Trojan_horse_(computing)" title="Trojan horse (computing)">trojans</a> every hour. The scope of this attack is big enough to attract crackers who actually know what they are doing..."<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>Microsoft continued to promote the tool through 1999 and the first half of 2000. Initial releases of <a href="/wiki/Windows_2000" title="Windows 2000">Windows 2000</a> shipped with the tool. The tool did not support Windows 95 and Windows NT 4.0. </p> <div class="mw-heading mw-heading3"><h3 id="Automatic_Updates">Automatic Updates</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=4" title="Edit section: Automatic Updates"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Winautoupdates.PNG" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/2/2b/Winautoupdates.PNG/220px-Winautoupdates.PNG" decoding="async" width="220" height="71" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/2/2b/Winautoupdates.PNG/330px-Winautoupdates.PNG 1.5x, //upload.wikimedia.org/wikipedia/en/2/2b/Winautoupdates.PNG 2x" data-file-width="428" data-file-height="139" /></a><figcaption>Automatic Updates "Restart Required" <a href="/wiki/Dialog_box" title="Dialog box">dialog box</a> in <a href="/wiki/Windows_XP" title="Windows XP">Windows XP</a> Service Pack 1</figcaption></figure> <p><i>Automatic Updates</i> is the successor of the Critical Update Notification Utility. It was released in 2000, along with <a href="/wiki/Windows_Me" title="Windows Me">Windows Me</a>. It supports Windows 2000 SP3 as well. </p><p>Unlike its predecessor, Automatic Updates can download and install updates. Instead of the five-minute schedule used by its predecessor, Automatic Updates checks the Windows Update servers once a day. After Windows Me is installed, a <a href="/wiki/Balloon_help" title="Balloon help">notification balloon</a> prompts the user to configure the Automatic Updates client. The user can choose from three notification schemes: being notified before downloading the update, being notified before installing the update, or both. If new updates are ready to be installed, the user may install them before turning off the computer. A shield icon will be displayed on the <a href="/wiki/Shutdown_(computing)" title="Shutdown (computing)">Shutdown</a> button during this time. </p><p>Windows XP and Windows 2000 SP3 include <a href="/wiki/Background_Intelligent_Transfer_Service" title="Background Intelligent Transfer Service">Background Intelligent Transfer Service</a>, a <a href="/wiki/Windows_service" title="Windows service">Windows service</a> for transferring files in the background without user interaction. As a system component, it is capable of monitoring the user's Internet usage and throttling its own bandwidth usage in order to prioritize user-initiated activities. The Automatic Updates client for these operating systems was updated to use this system service. </p><p>Automatic Updates in Windows XP gained notoriety for repeatedly interrupting the user while working on their computer. Every time an update requiring a reboot was installed, Automatic Updates would prompt the user with a dialog box that allowed the user to restart immediately or dismiss the dialog box, which would reappear in ten minutes; a behavior that <a href="/wiki/Jeff_Atwood" title="Jeff Atwood">Jeff Atwood</a> described as "perhaps the naggiest dialog box ever."<sup id="cite_ref-atwood_14-0" class="reference"><a href="#cite_note-atwood-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p>In 2013, it was observed that shortly after the <a href="/wiki/Booting" title="Booting">startup process</a>, Automatic Updates (<code>wuauclt.exe</code>) and Service Host (<code><a href="/wiki/Svchost.exe" title="Svchost.exe">svchost.exe</a>)</code> in Windows XP would claim 100% of a computer's CPU capacity for extended periods of time (between ten minutes to two hours), making affected computers unusable. According to Woody Leonhart of <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>, early reports of this issue could be seen in <a href="/wiki/Microsoft_TechNet" title="Microsoft TechNet">Microsoft TechNet</a> <a href="/wiki/Internet_forum" title="Internet forum">forums</a> in late May 2013, although Microsoft first received a large number of complaints about this issue in September 2013. The cause was an <a href="/wiki/Exponential_algorithm" class="mw-redirect" title="Exponential algorithm">exponential algorithm</a> in the evaluation of superseded updates, which had grown large over the decade following the release of Windows XP. Microsoft's attempts to fix the issue in October, November and December proved futile, causing the issue to be escalated to the top priority.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Windows_Update_Agent">Windows Update Agent</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=5" title="Edit section: Windows Update Agent"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Windows_Update_Restart_Vista.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/f/f2/Windows_Update_Restart_Vista.png/220px-Windows_Update_Restart_Vista.png" decoding="async" width="220" height="132" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/f2/Windows_Update_Restart_Vista.png/330px-Windows_Update_Restart_Vista.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/f2/Windows_Update_Restart_Vista.png/440px-Windows_Update_Restart_Vista.png 2x" data-file-width="450" data-file-height="270" /></a><figcaption>Revised restart <a href="/wiki/Dialog_box" title="Dialog box">dialog box</a> in <a href="/wiki/Windows_Vista" title="Windows Vista">Windows Vista</a></figcaption></figure> <p>Starting with <a href="/wiki/Windows_Vista" title="Windows Vista">Windows Vista</a> and <a href="/wiki/Windows_Server_2008" title="Windows Server 2008">Windows Server 2008</a>, <i>Windows Update Agent</i> replaces both the Windows Update web app and the Automatic Updates client.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> It is in charge of downloading and installing software update from Windows Update, as well as the on-premises servers of <a href="/wiki/Windows_Server_Update_Services" title="Windows Server Update Services">Windows Server Updates Services</a> or <a href="/wiki/System_Center_Configuration_Manager" class="mw-redirect" title="System Center Configuration Manager">System Center Configuration Manager</a>.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>Windows Update Agent can be managed through a <a href="/wiki/Control_Panel_(Windows)" title="Control Panel (Windows)">Control Panel</a> applet, as well as <a href="/wiki/Group_Policy" title="Group Policy">Group Policy</a>, <a href="/wiki/Microsoft_Intune" title="Microsoft Intune">Microsoft Intune</a> and <a href="/wiki/Windows_PowerShell" class="mw-redirect" title="Windows PowerShell">Windows PowerShell</a>. It can also be set to automatically download and install both <i>important</i> and <i>recommended</i> updates. In prior versions of Windows, such updates were only available through the Windows Update website. Additionally, Windows Update in Windows Vista supports downloading <a href="/wiki/Windows_Ultimate_Extras" title="Windows Ultimate Extras">Windows Ultimate Extras</a>, optional software for Windows Vista Ultimate Edition. </p><p>Unlike Automatic Updates in Windows XP, Windows Update Agent in Windows Vista and Windows 7 allows the user to postpone the mandatory restart (required for the update process to complete) for up to four hours. The revised dialog box that prompts for the restart appears under other windows, instead of on top of them. However, standard user accounts only have 15 minutes to respond to this dialog box. This was changed with <a href="/wiki/Windows_8" title="Windows 8">Windows 8</a>: Users have 3 days (72 hours) before the computer reboots automatically after installing automatic updates that require a reboot. Windows 8 also consolidates the restart requests for non-critical updates into just one per month. Additionally, the login screen notifies them of the restart requirements.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p><p>Windows Update Agent makes use of the <a href="/wiki/Transactional_NTFS" title="Transactional NTFS">Transactional NTFS</a> feature introduced with Windows Vista to apply updates to Windows system files. This feature helps Windows recover cleanly in the event of an unexpected failure, as file changes are committed <a href="/wiki/Atomicity_(database_systems)" title="Atomicity (database systems)">atomically</a>.<sup id="cite_ref-filecab_22-0" class="reference"><a href="#cite_note-filecab-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p><p>Since <a href="/wiki/Windows_8" title="Windows 8">Windows 8</a>, the Windows Update is able to offers device firmware updates, for example <a href="/wiki/UEFI" title="UEFI">UEFI</a>. </p><p><a href="/wiki/Windows_10" title="Windows 10">Windows 10</a> contains major changes to Windows Update Agent operations; it no longer allows the manual, selective installation of updates. All updates, regardless of type (this includes hardware drivers), are downloaded and installed automatically, and users are only given the option to choose whether their system would reboot automatically to install updates when the system is inactive or be notified to schedule a reboot.<sup id="cite_ref-cnet-scheduleupdate_23-0" class="reference"><a href="#cite_note-cnet-scheduleupdate-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-crn-updates_24-0" class="reference"><a href="#cite_note-crn-updates-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> Microsoft offers a diagnostic tool that can be used to hide troublesome device drivers and prevent them from being reinstalled, but only after they had already been installed and then uninstalled without rebooting the system.<sup id="cite_ref-iw-nvidiadriver_25-0" class="reference"><a href="#cite_note-iw-nvidiadriver-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-iw-3073930_26-0" class="reference"><a href="#cite_note-iw-3073930-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>Windows Update Agent on Windows 10 supports <a href="/wiki/Peer-to-peer" title="Peer-to-peer">peer-to-peer</a> distribution of updates; by default, systems' <a href="/wiki/Bandwidth_(computing)" title="Bandwidth (computing)">bandwidth</a> is used to distribute previously downloaded updates to other users, in combination with Microsoft servers. Users may optionally change Windows Update to only perform peer-to-peer updates within their <a href="/wiki/Local_area_network" title="Local area network">local area network</a>.<sup id="cite_ref-pcw-peertopeer_27-0" class="reference"><a href="#cite_note-pcw-peertopeer-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> </p><p>Windows 10 also introduced cumulative updates. For example, if Microsoft released updates KB00001 in July, KB00002 in August, and KB00003 in September, Microsoft would release cumulative update KB00004, which packs KB00001, KB00002, and KB00003 together. Installing KB00004 will also install KB00001, KB00002 and KB00003, mitigating the need for multiple restarts and reducing the number of downloads needed. KB00004 may also include other fixes with their own KB number that were not separately released.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> A disadvantage of cumulative updates is that downloading and installing updates that fix individual problems is no longer possible. KB stands for knowledge base, as in <a href="/wiki/Microsoft_Knowledge_Base" title="Microsoft Knowledge Base">Microsoft Knowledge Base</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Windows_Update_for_Business">Windows Update for Business</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=6" title="Edit section: Windows Update for Business"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Windows Update for Business</i> is a term for a set of features in the <a href="/wiki/Windows_10_editions" title="Windows 10 editions">Pro, Enterprise and Education editions of Windows 10</a>, intended to ease the administration of Windows across organizations. It enables IT pros to:<sup id="cite_ref-WUfB1_29-0" class="reference"><a href="#cite_note-WUfB1-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-WUfB2_30-0" class="reference"><a href="#cite_note-WUfB2-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-WUfB3_31-0" class="reference"><a href="#cite_note-WUfB3-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Switch between the standard and the deferred <a href="/wiki/Windows_10_editions#Release_branches" title="Windows 10 editions">release branches of Windows 10</a>. This feature has since been removed as Microsoft retired the deferred branch.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup></li> <li>Defer automatic installation of ordinary updates for 30 days. Starting with Windows 10 version 20H1, this feature is more difficult to access.<sup id="cite_ref-:0_33-0" class="reference"><a href="#cite_note-:0-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup></li> <li>Defer automatic installation of Windows upgrades (a.k.a. "feature updates") for 365 days. Starting with Windows 10 version 20H1, these updates are no longer automatically offered.<sup id="cite_ref-:0_33-1" class="reference"><a href="#cite_note-:0-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup></li></ul> <p>These features were added in Windows 10 version 1511.<sup id="cite_ref-WUfB-EdBott_34-0" class="reference"><a href="#cite_note-WUfB-EdBott-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> They are intended for large organizations with many computers, so they can logically group their computers for gradual deployment. Microsoft recommends a small set of pilot computers to receive the updates almost immediately, while the set of most critical computers receives them after every other group has done so, and has experienced their effects.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p><p>Other Microsoft update management solutions, such as <a href="/wiki/Windows_Server_Update_Services" title="Windows Server Update Services">Windows Server Update Services</a> or <a href="/wiki/System_Center_Configuration_Manager" class="mw-redirect" title="System Center Configuration Manager">System Center Configuration Manager</a>, do not override Windows Update for Business. Rather, they force Windows 10 into the "dual scan mode". his can cause confusion for administrators who do not comprehend the full ramifications of the dual scan mode.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Complementary_software_and_services">Complementary software and services</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=7" title="Edit section: Complementary software and services"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>As organizations continued to use more computers, the per-machine Windows Update clients started to become unwieldy and insufficient. In response to the need of organizations for deploying updates to many machines, Microsoft introduced Software Update Services (SUS), which was later renamed <a href="/wiki/Windows_Server_Update_Services" title="Windows Server Update Services">Windows Server Update Services</a> (WSUS). A component of the <a href="/wiki/Windows_Server" title="Windows Server">Windows Server</a> family of operating systems, WSUS downloads updates for Microsoft products to a <a href="/wiki/Server_computer" class="mw-redirect" title="Server computer">server computer</a> on which it is running and redistributes them to the computers within the organization over a <a href="/wiki/Local_area_network" title="Local area network">local area network</a> (LAN). One of the benefits of this method is a reduction in the consumption of Internet bandwidth, equal to <i>(N-1)×S</i>, where N is the number of computers in the organization and S is the size made by the updates. Additionally, WSUS permits administrators to test updates on a small group of test computers before deploying them to all systems in order to ensure that business continuity is not disrupted because of the changes of the updates. For very large organizations, multiple WSUS servers can be chained together hierarchically. Only one server in this hierarchy downloads from the Internet. </p><p>Update packages distributed via the Windows Update service can be individually downloaded from <a href="/wiki/Microsoft_Update_Catalog" title="Microsoft Update Catalog">Microsoft Update Catalog</a>. These updates can be installed on computers without internet access (e.g. via USB flash drive) or <a href="/wiki/Slipstream_(computing)" class="mw-redirect" title="Slipstream (computing)">slipstreamed</a> with a Windows installation. In case of the former, Windows Update Agent (<code>wusa.exe</code>) can install these files. In case of the latter, Microsoft deployment utilities such as <a href="/wiki/Deployment_Image_Service_and_Management_Tool" class="mw-redirect" title="Deployment Image Service and Management Tool">DISM</a>, <a href="/wiki/Windows_Assessment_and_Deployment_Kit" title="Windows Assessment and Deployment Kit">WADK</a> and <a href="/wiki/Microsoft_Deployment_Toolkit" title="Microsoft Deployment Toolkit">MDT</a> can consume these packages. </p><p>Microsoft offers <a href="/wiki/System_Center_Configuration_Manager" class="mw-redirect" title="System Center Configuration Manager">System Center Configuration Manager</a> for very complex deployment and servicing scenarios. The product integrates with all of the aforesaid tools (WSUS, DISM, WADK, MDT) to automate the process. </p> <div class="mw-heading mw-heading3"><h3 id="Third-party_services">Third-party services</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=8" title="Edit section: Third-party services"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A number of tools have been created by independent software vendors which provide the ability for Windows updates to be automatically downloaded for, or added to, an online or offline system. One common use for offline updates is to ensure a system is fully <a href="/wiki/Patch_(computing)" title="Patch (computing)">patched</a> against <a href="/wiki/Security_vulnerability" class="mw-redirect" title="Security vulnerability">security vulnerabilities</a> before being connected to the <a href="/wiki/Internet" title="Internet">Internet</a> or another network. A second use is that downloads can be very large, but may be dependent on a slow or unreliable network connection, or the same updates may be needed for more than one machine. <a href="/wiki/AutoPatcher" title="AutoPatcher">AutoPatcher</a>, WSUS Offline Update, PortableUpdate, and Windows Updates Downloader are examples of such tools.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> </p><p>Third-party services exist for obtaining updates from Windows Update for older Windows versions. These include Legacy Update, which is a community-driven third party replacement for the Windows Update servers for unsupported versions of Windows from <a href="/wiki/Windows_2000" title="Windows 2000">Windows 2000</a> onward.<sup id="cite_ref-:02_38-0" class="reference"><a href="#cite_note-:02-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> Windows Update Restored is another community-driven third-party replacement for Windows Update on older versions of Windows designed to replicate the functionality of older Windows Update versions, which also includes the old updates for all <a href="/wiki/Windows_9x" title="Windows 9x">Windows 9x</a> releases and Windows NT 4.0.<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:02_38-1" class="reference"><a href="#cite_note-:02-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Service">Service</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=9" title="Edit section: Service"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>At the beginning of 2005, Windows Update was being accessed by about 150 million people,<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> with about 112 million of those using Automatic Updates.<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> As of 2008<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Windows_Update&action=edit">[update]</a></sup>, Windows Update had about 500 million clients, processed about 350 million unique scans per day, and maintained an average of 1.5 million simultaneous connections to client machines. On <a href="/wiki/Patch_Tuesday" title="Patch Tuesday">Patch Tuesday</a>, the day Microsoft typically releases new software updates, outbound traffic could exceed 500 <a href="/wiki/Gigabit" class="mw-redirect" title="Gigabit">gigabits</a> per second.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup> Approximately 90% of all clients used automatic updates to initiate software updates, with the remaining 10% using the Windows Update web site. The website is built using <a href="/wiki/ASP.NET" title="ASP.NET">ASP.NET</a>, and processes an average of 90,000 page requests per second. </p><p>Traditionally, the service provided each patch in its own proprietary archive file. Occasionally, Microsoft released <a href="/wiki/Service_packs" class="mw-redirect" title="Service packs">service packs</a> which bundled all updates released over the course of years for a certain product. Starting with Windows 10, however, all patches are delivered in cumulative packages.<sup id="cite_ref-cw-culmwitheld_44-0" class="reference"><a href="#cite_note-cw-culmwitheld-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> On 15 August 2016, Microsoft announced that effective October 2016, all future patches to Windows 7 and 8.1 would become cumulative as with Windows 10. The ability to download and install individual updates would be removed as existing updates are transitioned to this model.<sup id="cite_ref-ars-culum7and81_45-0" class="reference"><a href="#cite_note-ars-culum7and81-45"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> This has resulted in increasing download sizes of each monthly update. An analysis done by <a href="/wiki/Computerworld" title="Computerworld">Computerworld</a> determined that the download size for Windows 7 x64 has increased from 119. 4MB in October 2016 to 20 3MB in October 2017.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup> Initially, Microsoft was very vague about specific changes within each cumulative update package.<sup id="cite_ref-cw-culmwitheld_44-1" class="reference"><a href="#cite_note-cw-culmwitheld-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> However, since early 2016, Microsoft has begun releasing more detailed information on the specific changes.<sup id="cite_ref-Windows_10_Update_History_47-0" class="reference"><a href="#cite_note-Windows_10_Update_History-47"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> </p><p>In 2011, the Windows Update service was decommissioned for Windows 98, 98 SE, Me and NT 4.0 and the old updates for those systems were removed from its servers.<sup id="cite_ref-:02_38-2" class="reference"><a href="#cite_note-:02-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> On August 3, 2020, the update service was decommissioned for Windows 2000, XP, Server 2003 and Vista due to Microsoft discontinuing SHA-1 updates. As of 2021<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Windows_Update&action=edit">[update]</a></sup>, the old updates for 2000 through Vista are still available on the <a href="/wiki/Microsoft_Update_Catalog" title="Microsoft Update Catalog">Microsoft Update Catalog</a>.<sup id="cite_ref-SHA1discont_48-0" class="reference"><a href="#cite_note-SHA1discont-48"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup> On the same day ,SHA-1 updates were discontinued for older Windows versions prior to 7 and Server 2008. Updating Windows 7 and Server 2008 via the Windows Update service was also affected; however, Microsoft has provided SHA-2 patches that allowed Windows 7 and Server 2008 to continue receiving updates.<sup id="cite_ref-SHA1discont_48-1" class="reference"><a href="#cite_note-SHA1discont-48"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Microsoft_Update">Microsoft Update</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=10" title="Edit section: Microsoft Update"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Microsoft_Update_in_Windows_XP.PNG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/f/ff/Microsoft_Update_in_Windows_XP.PNG/250px-Microsoft_Update_in_Windows_XP.PNG" decoding="async" width="220" height="158" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/f/ff/Microsoft_Update_in_Windows_XP.PNG 1.5x" data-file-width="325" data-file-height="234" /></a><figcaption>The Microsoft Update website in <a href="/wiki/Internet_Explorer_6" title="Internet Explorer 6">Internet Explorer 6</a> on <a href="/wiki/Windows_XP" title="Windows XP">Windows XP</a></figcaption></figure> <p>At the February 2005 <a href="/wiki/RSA_Conference" title="RSA Conference">RSA Conference</a>, Microsoft announced the first beta of <i>Microsoft Update</i>, an optional replacement for Windows Update that provides security patches, service packs and other updates for both Windows and other Microsoft software.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">[</span>49<span class="cite-bracket">]</span></a></sup> The initial release in June 2005 provided support for <a href="/wiki/Microsoft_Office" title="Microsoft Office">Microsoft Office 2003</a>, <a href="/wiki/Microsoft_Exchange_Server" title="Microsoft Exchange Server">Exchange 2003</a>, and <a href="/wiki/Microsoft_SQL_Server" title="Microsoft SQL Server">SQL Server 2000</a>, running on Windows 2000, XP, and Server 2003. Over time, the list has expanded to include other Microsoft products, such as <a href="/wiki/Windows_Live_Essentials" class="mw-redirect" title="Windows Live Essentials">Windows Live</a>, <a href="/wiki/Windows_Defender" class="mw-redirect" title="Windows Defender">Windows Defender</a>, <a href="/wiki/Microsoft_Visual_Studio" class="mw-redirect" title="Microsoft Visual Studio">Visual Studio</a>, runtimes and redistributables, <a href="/wiki/Zune" title="Zune">Zune Software</a>, <a href="/wiki/Windows_Virtual_PC" class="mw-redirect" title="Windows Virtual PC">Virtual PC</a> and <a href="/wiki/Microsoft_Virtual_Server" title="Microsoft Virtual Server">Virtual Server</a>, <a href="/wiki/CAPICOM" title="CAPICOM">CAPICOM</a>, <a href="/wiki/Microsoft_Lync" class="mw-redirect" title="Microsoft Lync">Microsoft Lync</a>, <a href="/wiki/Microsoft_Expression_Studio" title="Microsoft Expression Studio">Microsoft Expression Studio</a>, and other server products. It also offers <a href="/wiki/Microsoft_Silverlight" title="Microsoft Silverlight">Silverlight</a> and <a href="/wiki/Windows_Media_Player" title="Windows Media Player">Windows Media Player</a> as optional downloads if applicable to the operating system. </p> <div class="mw-heading mw-heading3"><h3 id="Command_Line_Updates_Tools">Command Line Updates Tools</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=11" title="Edit section: Command Line Updates Tools"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are only a handful of command line tools to install Windows updates. A very common tool that already works under Windows 7 and has no external dependencies is, for example, wuinstall.exe. It can push Windows updates to a computer (wuinstall.exe /install).<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2023)">citation needed</span></a></i>]</sup> </p> <div class="mw-heading mw-heading3"><h3 id="Office_Update">Office Update</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=12" title="Edit section: Office Update"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Office Update</i> is a free online service that allows users to detect and install updates for certain Microsoft Office products. The original update service supported <a href="/wiki/Microsoft_Office_2000" title="Microsoft Office 2000">Office 2000</a>, <a href="/wiki/Microsoft_Office_XP" title="Microsoft Office XP">Office XP</a>, <a href="/wiki/Microsoft_Office_2003" title="Microsoft Office 2003">Office 2003</a> and <a href="/wiki/Microsoft_Office_2007" title="Microsoft Office 2007">Office 2007</a>. </p><p>On 1 August 2009, Microsoft decommissioned the Office Update service, merging it with Microsoft Update.<sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">[</span>50<span class="cite-bracket">]</span></a></sup> Microsoft Update supported all versions of Microsoft Office up to Office 2007 and later; however, it does not support Office 2000. </p><p>With the introduction of the <a href="/wiki/Office_365" class="mw-redirect" title="Office 365">Office 365</a> licensing program, however, Microsoft once again activated a separate Office update service.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">[</span>52<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=13" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output 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Retrieved <span class="nowrap">4 August</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=CRN.com&rft.atitle=Did+Microsoft+Just+Backtrack+On+Forced+Updates+For+Windows+10%3F&rft.date=2015-07-27&rft_id=http%3A%2F%2Fwww.crn.com%2Fnews%2Fapplications-os%2F300077576%2Fdid-microsoft-just-backtrack-on-forced-updates-for-windows-10.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-iw-nvidiadriver-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-iw-nvidiadriver_25-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.infoworld.com/article/2952996/microsoft-windows/on-the-road-to-windows-10-botched-nvidia-driver-tests-kb-3073930-patch-blocker.html">"On the road to Windows 10: Nvidia driver tests KB 3073930 patch blocker"</a>. <i>InfoWorld</i>. 27 July 2015. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170620044549/http://www.infoworld.com/article/2952996/microsoft-windows/on-the-road-to-windows-10-botched-nvidia-driver-tests-kb-3073930-patch-blocker.html">Archived</a> from the original on 20 June 2017<span class="reference-accessdate">. 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Retrieved <span class="nowrap">22 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=4+Tools+to+Update+Windows+Offline+and+install+Hotfixes+from+a+Local+Source&rft.pub=raymond.cc&rft.date=2005-11-14&rft_id=https%3A%2F%2Fwww.raymond.cc%2Fblog%2Foffline-windows-update%2F1%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-:02-38"><span class="mw-cite-backlink">^ <a href="#cite_ref-:02_38-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:02_38-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-:02_38-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFCunningham2023" class="citation web cs1">Cunningham, Andrew (10 July 2023). <a rel="nofollow" class="external text" href="https://arstechnica.com/gadgets/2023/07/windows-95-98-and-other-decrepit-versions-can-grab-online-updates-again/">"Windows 95, 98, and other decrepit versions can grab online updates again"</a>. <i><a href="/wiki/Ars_Technica" title="Ars Technica">Ars Technica</a></i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240805020423/https://arstechnica.com/gadgets/2023/07/windows-95-98-and-other-decrepit-versions-can-grab-online-updates-again/">Archived</a> from the original on 5 August 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">5 August</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Ars+Technica&rft.atitle=Windows+95%2C+98%2C+and+other+decrepit+versions+can+grab+online+updates+again&rft.date=2023-07-10&rft.aulast=Cunningham&rft.aufirst=Andrew&rft_id=https%3A%2F%2Farstechnica.com%2Fgadgets%2F2023%2F07%2Fwindows-95-98-and-other-decrepit-versions-can-grab-online-updates-again%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-39">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://legacyupdate.net/">"Legacy Update: Get back online, activate, and install updates on your legacy Windows PC"</a>. <i>Legacy Update</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240731101902/https://legacyupdate.net/">Archived</a> from the original on 31 July 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">5 August</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Legacy+Update&rft.atitle=Legacy+Update%3A+Get+back+online%2C+activate%2C+and+install+updates+on+your+legacy+Windows+PC&rft_id=https%3A%2F%2Flegacyupdate.net%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-40"><span class="mw-cite-backlink"><b><a href="#cite_ref-40">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFTyson2023" class="citation web cs1">Tyson, Mark (9 July 2023). <a rel="nofollow" class="external text" href="https://www.tomshardware.com/news/windows-update-restored-site-provides-updates-for-classic-windows-versions">"<span class="cs1-kern-left"></span>'Windows Update Restored' Site Provides Updates for Classic Windows Versions"</a>. <i><a href="/wiki/Tom%27s_Hardware" title="Tom's Hardware">Tom's Hardware</a></i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240727021528/https://www.tomshardware.com/news/windows-update-restored-site-provides-updates-for-classic-windows-versions">Archived</a> from the original on 27 July 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">5 August</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Tom%27s+Hardware&rft.atitle=%27Windows+Update+Restored%27+Site+Provides+Updates+for+Classic+Windows+Versions&rft.date=2023-07-09&rft.aulast=Tyson&rft.aufirst=Mark&rft_id=https%3A%2F%2Fwww.tomshardware.com%2Fnews%2Fwindows-update-restored-site-provides-updates-for-classic-windows-versions&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-41"><span class="mw-cite-backlink"><b><a href="#cite_ref-41">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.microsoft.com/presspass/exec/billg/speeches/2005/02-15RSA05.aspx">"RSA Conference 2005: "Security: Raising the Bar" (speech transcript)"</a>. <i>PressPass</i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. 15 February 2005. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090308012856/http://www.microsoft.com/presspass/exec/billg/speeches/2005/02-15RSA05.aspx">Archived</a> from the original on 8 March 2009<span class="reference-accessdate">. Retrieved <span class="nowrap">30 July</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=PressPass&rft.atitle=RSA+Conference+2005%3A+%22Security%3A+Raising+the+Bar%22+%28speech+transcript%29&rft.date=2005-02-15&rft_id=http%3A%2F%2Fwww.microsoft.com%2Fpresspass%2Fexec%2Fbillg%2Fspeeches%2F2005%2F02-15RSA05.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-42"><span class="mw-cite-backlink"><b><a href="#cite_ref-42">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.microsoft.com/presspass/press/2005/jan05/01-06newsolutionspr.mspx">"Microsoft Announces Availability of New Solutions to Help Protect Customers Against Spyware and Viruses"</a>. <i>PressPass</i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. 6 January 2005. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120402131647/http://www.microsoft.com/presspass/press/2005/jan05/01-06NewSolutionsPR.mspx">Archived</a> from the original on 2 April 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">30 July</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=PressPass&rft.atitle=Microsoft+Announces+Availability+of+New+Solutions+to+Help+Protect+Customers+Against+Spyware+and+Viruses&rft.date=2005-01-06&rft_id=http%3A%2F%2Fwww.microsoft.com%2Fpresspass%2Fpress%2F2005%2Fjan05%2F01-06newsolutionspr.mspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-43"><span class="mw-cite-backlink"><b><a href="#cite_ref-43">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://technet.microsoft.com/en-us/library/cc627316.aspx">"Introducing the Microsoft.com Engineering Operations Team"</a>. <i><a href="/wiki/Microsoft_TechNet" title="Microsoft TechNet">Microsoft TechNet</a></i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. 2008. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170826182930/https://technet.microsoft.com/en-us/library/cc627316.aspx">Archived</a> from the original on 26 August 2017<span class="reference-accessdate">. Retrieved <span class="nowrap">31 May</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Microsoft+TechNet&rft.atitle=Introducing+the+Microsoft.com+Engineering+Operations+Team&rft.date=2008&rft_id=https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fcc627316.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-cw-culmwitheld-44"><span class="mw-cite-backlink">^ <a href="#cite_ref-cw-culmwitheld_44-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-cw-culmwitheld_44-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.computerworld.com/article/2983753/microsoft-windows/windows-10-users-beg-microsoft-for-more-info-on-updates.html">"Windows 10 users beg Microsoft for more info on updates"</a>. <i>Computerworld</i>. IDG. 14 September 2015. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150914235823/http://www.computerworld.com/article/2983753/microsoft-windows/windows-10-users-beg-microsoft-for-more-info-on-updates.html">Archived</a> from the original on 14 September 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">30 September</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Computerworld&rft.atitle=Windows+10+users+beg+Microsoft+for+more+info+on+updates&rft.date=2015-09-14&rft_id=http%3A%2F%2Fwww.computerworld.com%2Farticle%2F2983753%2Fmicrosoft-windows%2Fwindows-10-users-beg-microsoft-for-more-info-on-updates.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-ars-culum7and81-45"><span class="mw-cite-backlink"><b><a href="#cite_ref-ars-culum7and81_45-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://arstechnica.com/business/2016/08/windows-7-8-1-moving-to-windows-10s-cumulative-update-model/">"Windows 7, 8.1 moving to Windows 10's cumulative update model"</a>. <i>Ars Technica</i>. Conde Nast Digital. 15 August 2016. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170214193755/https://arstechnica.com/business/2016/08/windows-7-8-1-moving-to-windows-10s-cumulative-update-model/">Archived</a> from the original on 14 February 2017<span class="reference-accessdate">. Retrieved <span class="nowrap">16 August</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Ars+Technica&rft.atitle=Windows+7%2C+8.1+moving+to+Windows+10%27s+cumulative+update+model&rft.date=2016-08-15&rft_id=https%3A%2F%2Farstechnica.com%2Fbusiness%2F2016%2F08%2Fwindows-7-8-1-moving-to-windows-10s-cumulative-update-model%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-46"><span class="mw-cite-backlink"><b><a href="#cite_ref-46">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGregg_Keizer2017" class="citation web cs1">Gregg Keizer (14 December 2017). <a rel="nofollow" class="external text" href="https://www.computerworld.com/article/3242745/microsoft-windows/why-windows-7-updates-are-getting-bigger.html">"Why Windows 7 updates are getting bigger"</a>. Computerworld. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20181122215906/https://www.computerworld.com/article/3242745/microsoft-windows/why-windows-7-updates-are-getting-bigger.html">Archived</a> from the original on 22 November 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">22 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Why+Windows+7+updates+are+getting+bigger&rft.pub=Computerworld&rft.date=2017-12-14&rft.au=Gregg+Keizer&rft_id=https%3A%2F%2Fwww.computerworld.com%2Farticle%2F3242745%2Fmicrosoft-windows%2Fwhy-windows-7-updates-are-getting-bigger.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-Windows_10_Update_History-47"><span class="mw-cite-backlink"><b><a href="#cite_ref-Windows_10_Update_History_47-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://windows.microsoft.com/en-us/windows-10/update-history-windows-10">"Windows 10 update details"</a>. <i>Windows 10 update history</i>. Microsoft. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160305002110/http://windows.microsoft.com/en-us/windows-10/update-history-windows-10">Archived</a> from the original on 5 March 2016<span class="reference-accessdate">. Retrieved <span class="nowrap">4 March</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Windows+10+update+history&rft.atitle=Windows+10+update+details&rft_id=http%3A%2F%2Fwindows.microsoft.com%2Fen-us%2Fwindows-10%2Fupdate-history-windows-10&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-SHA1discont-48"><span class="mw-cite-backlink">^ <a href="#cite_ref-SHA1discont_48-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-SHA1discont_48-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://support.microsoft.com/en-gb/help/4569557/windows-update-sha-1-based-endpoints-discontinued">"Windows Update SHA-1 based endpoints discontinued for older Windows devices"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201218112919/https://support.microsoft.com/en-gb/help/4569557/windows-update-sha-1-based-endpoints-discontinued">Archived</a> from the original on 18 December 2020<span class="reference-accessdate">. Retrieved <span class="nowrap">5 August</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Windows+Update+SHA-1+based+endpoints+discontinued+for+older+Windows+devices&rft_id=https%3A%2F%2Fsupport.microsoft.com%2Fen-gb%2Fhelp%2F4569557%2Fwindows-update-sha-1-based-endpoints-discontinued&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-49"><span class="mw-cite-backlink"><b><a href="#cite_ref-49">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.helpwithwindows.com/microsoft-update.html">"Microsoft Update Site Launched"</a>. <i>helpwithwindows.com</i>. 10 June 2005. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20181122215459/http://www.helpwithwindows.com/microsoft-update.html">Archived</a> from the original on 22 November 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">30 July</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=helpwithwindows.com&rft.atitle=Microsoft+Update+Site+Launched&rft.date=2005-06-10&rft_id=http%3A%2F%2Fwww.helpwithwindows.com%2Fmicrosoft-update.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-50"><span class="mw-cite-backlink"><b><a href="#cite_ref-50">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20100528120908/http://office.microsoft.com/en-us/downloads/FX010402221033.aspx">"About Office Update"</a>. <i>office.microsoft.com</i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. Archived from <a rel="nofollow" class="external text" href="http://office.microsoft.com/en-us/downloads/FX010402221033.aspx">the original</a> on 28 May 2010.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=office.microsoft.com&rft.atitle=About+Office+Update&rft_id=http%3A%2F%2Foffice.microsoft.com%2Fen-us%2Fdownloads%2FFX010402221033.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-51"><span class="mw-cite-backlink"><b><a href="#cite_ref-51">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://support.office.com/en-us/article/Install-Office-updates-2ab296f3-7f03-43a2-8e50-46de917611c5">"Install Office updates"</a>. <i>support.office.com</i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200523222354/https://support.office.com/en-us/article/Install-Office-updates-2ab296f3-7f03-43a2-8e50-46de917611c5">Archived</a> from the original on 23 May 2020<span class="reference-accessdate">. Retrieved <span class="nowrap">4 December</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=support.office.com&rft.atitle=Install+Office+updates&rft_id=https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FInstall-Office-updates-2ab296f3-7f03-43a2-8e50-46de917611c5&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> <li id="cite_note-52"><span class="mw-cite-backlink"><b><a href="#cite_ref-52">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://support.office.com/en-us/article/Check-for-Office-for-Mac-updates-automatically-bfd1e497-c24d-4754-92ab-910a4074d7c1">"Check for Office for Mac updates automatically"</a>. <i>support.office.com</i>. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180809152045/https://support.office.com/en-us/article/check-for-office-for-mac-updates-automatically-bfd1e497-c24d-4754-92ab-910a4074d7c1">Archived</a> from the original on 9 August 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">4 December</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=support.office.com&rft.atitle=Check+for+Office+for+Mac+updates+automatically&rft_id=https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FCheck-for-Office-for-Mac-updates-automatically-bfd1e497-c24d-4754-92ab-910a4074d7c1&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWindows+Update" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Windows_Update&action=edit&section=14" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" 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Replication</a></li> <li><a href="/wiki/Microsoft_Distributed_Transaction_Coordinator" title="Microsoft Distributed Transaction Coordinator">Distributed Transaction Coordinator</a></li> <li><a href="/wiki/Microsoft_DNS" title="Microsoft DNS">DNS</a></li> <li><a href="/wiki/Windows_domain" title="Windows domain">Domains</a></li> <li><a href="/wiki/Folder_redirection" title="Folder redirection">Folder redirection</a></li> <li><a href="/wiki/Group_Policy" title="Group Policy">Group Policy</a></li> <li><a href="/wiki/Hyper-V" title="Hyper-V">Hyper-V</a></li> <li><a href="/wiki/Internet_Information_Services" title="Internet Information Services">IIS</a></li> <li><a href="/wiki/Microsoft_Message_Queuing" title="Microsoft Message Queuing">MSMQ</a></li> <li><a href="/wiki/Network_Access_Protection" title="Network Access Protection">Network Access Protection</a></li> <li>Print Services for UNIX</li> <li><a href="/wiki/Microsoft_Personal_Web_Server" title="Microsoft Personal Web 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href="/wiki/Windows_Server_Update_Services" title="Windows Server Update Services">WSUS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software_architecture" title="Software architecture">Architecture</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Windows_Boot_Manager" title="Windows Boot Manager">Boot Manager</a></li> <li><a href="/wiki/Windows_Console" title="Windows Console">Console</a></li> <li><a href="/wiki/Client/Server_Runtime_Subsystem" title="Client/Server Runtime Subsystem">CSRSS</a></li> <li><a href="/wiki/Desktop_Window_Manager" title="Desktop Window Manager">Desktop Window Manager</a></li> <li><a href="/wiki/Enhanced_Write_Filter" title="Enhanced Write Filter">Enhanced Write Filter</a></li> <li><a href="/wiki/Graphics_Device_Interface" title="Graphics Device Interface">Graphics Device Interface</a></li> <li><a href="/wiki/Microsoft_Windows_library_files#Hardware_Abstraction_Layer" title="Microsoft Windows library files">Hardware Abstraction Layer</a></li> <li><a href="/wiki/I/O_request_packet" title="I/O request packet">I/O request packet</a></li> <li><a href="/wiki/Windows_Imaging_Format" title="Windows Imaging Format">Imaging Format</a></li> <li><a href="/wiki/Kernel_Transaction_Manager" title="Kernel Transaction Manager">Kernel Transaction Manager</a></li> <li><a href="/wiki/Microsoft_Windows_library_files" title="Microsoft Windows library files">Library files</a></li> <li><a href="/wiki/Logical_Disk_Manager" title="Logical Disk Manager">Logical Disk Manager</a></li> <li><a href="/wiki/Local_Security_Authority_Subsystem_Service" title="Local Security Authority Subsystem Service">LSASS</a></li> <li><a href="/wiki/MinWin" title="MinWin">MinWin</a></li> <li><a href="/wiki/NTLDR" title="NTLDR">NTLDR</a></li> <li><a href="/wiki/Ntoskrnl.exe" title="Ntoskrnl.exe">Ntoskrnl.exe</a></li> <li><a href="/wiki/Object_Manager" title="Object Manager">Object Manager</a></li> <li><a href="/wiki/Open_XML_Paper_Specification" title="Open XML Paper Specification">Open XML Paper Specification</a></li> <li><a href="/wiki/Portable_Executable" title="Portable Executable">Portable Executable</a> <ul><li><a href="/wiki/Dynamic-link_library" title="Dynamic-link library">DLL</a></li> <li><a href="/wiki/.exe" title=".exe">EXE</a></li></ul></li> <li><a href="/wiki/Windows_Registry" title="Windows Registry">Registry</a></li> <li><a href="/wiki/Windows_Resource_Protection" title="Windows Resource Protection">Resource Protection</a></li> <li><a href="/wiki/Security_Account_Manager" title="Security Account Manager">Security Account Manager</a></li> <li><a href="/wiki/Server_Message_Block" title="Server Message Block">Server Message Block</a></li> <li><a href="/wiki/Shadow_Copy" title="Shadow Copy">Shadow Copy</a></li> <li><a href="/wiki/Session_Manager_Subsystem" title="Session Manager Subsystem">SMSS</a></li> <li><a href="/wiki/System_Idle_Process" title="System Idle Process">System Idle Process</a></li> <li><a href="/wiki/Windows_USER" title="Windows USER">USER</a></li> <li><a href="/wiki/Windows_Hardware_Error_Architecture" title="Windows Hardware Error Architecture">WHEA</a></li> <li><a href="/wiki/Winlogon" title="Winlogon">Winlogon</a></li> <li><a href="/wiki/WinUSB" title="WinUSB">WinUSB</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Security</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Security_and_Maintenance" title="Security and Maintenance">Security and Maintenance</a></li> <li><a href="/wiki/AppLocker" title="AppLocker">AppLocker</a></li> <li><a href="/wiki/BitLocker" title="BitLocker">BitLocker</a></li> <li><a href="/wiki/Credential_Guard" title="Credential Guard">Credential Guard</a></li> <li><a href="/wiki/Data_Execution_Prevention" class="mw-redirect" title="Data Execution Prevention">Data Execution Prevention</a></li> <li><a href="/wiki/Microsoft_Defender_Antivirus" title="Microsoft Defender Antivirus">Defender</a></li> <li><a href="/wiki/Microsoft_family_features" title="Microsoft family features">Family features</a></li> <li><a href="/wiki/Kernel_Patch_Protection" title="Kernel Patch Protection">Kernel Patch Protection</a></li> <li><a href="/wiki/Mandatory_Integrity_Control" title="Mandatory Integrity Control">Mandatory Integrity Control</a></li> <li><a href="/wiki/Protected_Media_Path" title="Protected Media Path">Protected Media Path</a></li> <li><a href="/wiki/User_Account_Control" title="User Account Control">User Account Control</a></li> <li><a href="/wiki/User_Interface_Privilege_Isolation" title="User Interface Privilege Isolation">User Interface Privilege Isolation</a></li> <li><a href="/wiki/Windows_Firewall" title="Windows Firewall">Windows Firewall</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Compatibility</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/COMMAND.COM" title="COMMAND.COM">COMMAND.COM</a></li> <li><a href="/wiki/Windows_Subsystem_for_Linux" title="Windows Subsystem for Linux">Windows Subsystem for Linux</a></li> <li><a href="/wiki/WoW64" title="WoW64">WoW64</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/API" title="API">API</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Active_Scripting" title="Active Scripting">Active Scripting</a> <ul><li><a href="/wiki/JScript" title="JScript">JScript</a></li> <li><a href="/wiki/VBScript" title="VBScript">VBScript</a></li> <li><a href="/wiki/Windows_Script_Host" title="Windows Script Host">WSH</a></li></ul></li> <li><a href="/wiki/Component_Object_Model" title="Component Object Model">COM</a> <ul><li><a href="/wiki/ActiveX" title="ActiveX">ActiveX</a></li> <li><a href="/wiki/ActiveX_Document" title="ActiveX Document">ActiveX Document</a></li> <li><a href="/wiki/COM_Structured_Storage" title="COM Structured Storage">COM Structured storage</a></li> <li><a href="/wiki/Distributed_Component_Object_Model" title="Distributed Component Object Model">DCOM</a></li> <li><a href="/wiki/Object_Linking_and_Embedding" title="Object Linking and Embedding">OLE</a></li> <li><a href="/wiki/OLE_Automation" title="OLE Automation">OLE Automation</a></li> <li><a href="/wiki/Microsoft_Transaction_Server" title="Microsoft Transaction Server">Transaction Server</a></li></ul></li> <li><a href="/wiki/DirectX" title="DirectX">DirectX</a></li> <li><a href="/wiki/Windows_Native_API" title="Windows Native API">Native</a></li> <li><a href="/wiki/.NET" title=".NET">.NET</a></li> <li><a href="/wiki/Universal_Windows_Platform" title="Universal Windows Platform">Universal Windows Platform</a></li> <li><a href="/wiki/Windows_API" title="Windows API">WinAPI</a></li> <li><a href="/wiki/Windows_Mixed_Reality" title="Windows Mixed Reality">Windows Mixed Reality</a></li> <li><a href="/wiki/Windows_Runtime" title="Windows Runtime">Windows Runtime</a></li> <li><a href="/wiki/WinUSB" title="WinUSB">WinUSB</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Video_game" title="Video game">Games</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Microsoft_Solitaire_Collection" title="Microsoft Solitaire Collection">Solitaire Collection</a></i></li> <li><i><a href="/wiki/Surf_(video_game)" title="Surf (video game)">Surf</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Discontinued</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Games</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Full_Tilt!_Pinball#3D_Pinball_for_Windows_–_Space_Cadet" title="Full Tilt! Pinball">3D Pinball</a></i></li> <li><i><a href="/wiki/Chess_Titans" title="Chess Titans">Chess Titans</a></i></li> <li><i><a href="/wiki/Microsoft_FreeCell" title="Microsoft FreeCell">FreeCell</a></i></li> <li><i><a href="/wiki/Microsoft_Hearts" title="Microsoft Hearts">Hearts</a></i></li> <li><i><a href="/wiki/Windows_Ultimate_Extras" title="Windows Ultimate Extras">Hold 'Em</a></i></li> <li><i><a href="/wiki/InkBall" title="InkBall">InkBall</a></i></li> <li><i><a href="/wiki/Purble_Place" title="Purble Place">Purble Place</a></i></li> <li><i><a href="/wiki/Microsoft_Solitaire" title="Microsoft Solitaire">Solitaire</a></i></li> <li><i><a href="/wiki/Microsoft_Spider_Solitaire" title="Microsoft Spider Solitaire">Spider Solitaire</a></i></li> <li><i><a href="/wiki/Microsoft_Tinker" title="Microsoft Tinker">Tinker</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Apps</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ActiveMovie" title="ActiveMovie">ActiveMovie</a></li> <li><a href="/wiki/Windows_Address_Book" title="Windows Address Book">Address Book</a></li> <li><a href="/wiki/Windows_Anytime_Upgrade" title="Windows Anytime Upgrade">Anytime Upgrade</a></li> <li><a href="/wiki/Backup_and_Restore" title="Backup and Restore">Backup and Restore</a></li> <li><a href="/wiki/Cardfile" title="Cardfile">Cardfile</a></li> <li><a href="/wiki/Windows_CardSpace" title="Windows CardSpace">CardSpace</a></li> <li><a href="/wiki/CD_Player_(Windows)" title="CD Player (Windows)">CD Player</a></li> <li><a href="/wiki/Windows_Chat" title="Windows Chat">Chat</a></li> <li><a href="/wiki/Windows_Contacts" title="Windows Contacts">Contacts</a></li> <li><a href="/wiki/Cortana_(virtual_assistant)" title="Cortana (virtual assistant)">Cortana</a></li> <li><a href="/wiki/Windows_Desktop_Gadgets" title="Windows Desktop Gadgets">Desktop Gadgets</a></li> <li><a href="/wiki/Microsoft_Diagnostics" title="Microsoft Diagnostics">Diagnostics</a></li> <li><a href="/wiki/DriveSpace" title="DriveSpace">DriveSpace</a></li> <li><a href="/wiki/Windows_DVD_Maker" title="Windows DVD Maker">DVD Maker</a></li> <li><a href="/wiki/Windows_Easy_Transfer" title="Windows Easy Transfer">Easy Transfer</a></li> <li><a href="/wiki/Microsoft_Edge_Legacy" title="Microsoft Edge Legacy">Edge Legacy</a></li> <li><a href="/wiki/Microsoft_Fax" class="mw-redirect" title="Microsoft Fax">Fax</a></li> <li><a href="/wiki/MSN_Food_%26_Drink" class="mw-redirect" title="MSN Food & Drink">Food & Drink</a></li> <li><a href="/wiki/Groove_Music" title="Groove Music">Groove Music</a></li> <li><a href="/wiki/MSN_Health_%26_Fitness" class="mw-redirect" title="MSN Health & Fitness">Health & Fitness</a></li> <li><a href="/wiki/Help_and_Support_Center" class="mw-redirect" title="Help and Support Center">Help and Support Center</a></li> <li><a href="/wiki/HyperACCESS" title="HyperACCESS">HyperTerminal</a></li> <li><a href="/wiki/Imaging_for_Windows" title="Imaging for Windows">Imaging</a></li> <li><a href="/wiki/Internet_Explorer" title="Internet Explorer">Internet Explorer</a></li> <li><a href="/wiki/Windows_Journal" title="Windows Journal">Journal</a></li> <li><a href="/wiki/Make_Compatible" title="Make Compatible">Make Compatible</a></li> <li><a href="/wiki/Windows_Media_Center" title="Windows Media Center">Media Center</a></li> <li><a href="/wiki/Windows_Meeting_Space" title="Windows Meeting Space">Meeting Space</a></li> <li><a href="/wiki/Windows_Messaging" title="Windows Messaging">Messaging</a></li> <li><a href="/wiki/Windows_Messenger" title="Windows Messenger">Messenger</a></li> <li><a href="/wiki/Windows_Mobile_Device_Center" title="Windows Mobile Device Center">Mobile Device Center</a></li> <li><a href="/wiki/Windows_Movie_Maker" title="Windows Movie Maker">Movie Maker</a></li> <li><a href="/wiki/MSN_Dial-up" title="MSN Dial-up">MSN Dial-up</a></li> <li><a href="/wiki/Microsoft_NetMeeting" title="Microsoft NetMeeting">NetMeeting</a></li> <li><a href="/wiki/NTBackup" title="NTBackup">NTBackup</a></li> <li><a href="/wiki/Outlook_Express" title="Outlook Express">Outlook Express</a></li> <li><a href="/wiki/Paint_3D" title="Paint 3D">Paint 3D</a></li> <li><a href="/wiki/Microsoft_Pay" title="Microsoft Pay">Pay</a></li> <li><a href="/wiki/Phone_Companion" title="Phone Companion">Phone Companion</a></li> <li><a href="/wiki/Windows_Photo_Gallery" title="Windows Photo Gallery">Photo Gallery</a></li> <li><a href="/wiki/Windows_Photo_Viewer" title="Windows Photo Viewer">Photo Viewer</a></li> <li><a href="/wiki/Program_Manager" title="Program Manager">Program Manager</a></li> <li><a href="/wiki/Problem_Steps_Recorder" class="mw-redirect" title="Problem Steps Recorder">Steps Recorder</a></li> <li><a href="/wiki/Syskey" title="Syskey">Syskey</a></li> <li><a href="/wiki/Travel_(Windows)" class="mw-redirect" title="Travel (Windows)">Travel</a></li> <li><a href="/wiki/WinHelp" title="WinHelp">WinHelp</a></li> <li><a href="/wiki/WordPad" title="WordPad">WordPad</a></li> <li><a href="/wiki/Microsoft_Write" title="Microsoft Write">Write</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Desktop_Cleanup_Wizard" title="Desktop Cleanup Wizard">Desktop Cleanup Wizard</a></li> <li><a href="/wiki/Windows_File_Protection" title="Windows File Protection">File Protection</a></li> <li><a href="/wiki/Games_for_Windows" title="Games for Windows">Games for Windows</a></li> <li><a href="/wiki/High_Performance_File_System" title="High Performance File System">HPFS</a></li> <li><a href="/wiki/Interix" title="Interix">Interix</a></li> <li><a href="/wiki/Media_Control_Interface" title="Media Control Interface">Media Control Interface</a></li> <li><a href="/wiki/MS-DOS_7" title="MS-DOS 7">MS-DOS 7</a></li> <li><a href="/wiki/Next-Generation_Secure_Computing_Base" title="Next-Generation Secure Computing Base">Next-Generation Secure Computing Base</a></li> <li><a href="/wiki/Microsoft_POSIX_subsystem" title="Microsoft POSIX subsystem">POSIX subsystem</a></li> <li><a href="/wiki/Microsoft_ScanDisk" title="Microsoft ScanDisk">ScanDisk</a></li> <li><a href="/wiki/Video_for_Windows" title="Video for Windows">Video for Windows</a></li> <li><a href="/wiki/Virtual_DOS_machine" title="Virtual DOS machine">Virtual DOS machine</a></li> <li><a href="/wiki/Windows_on_Windows" title="Windows on Windows">Windows on Windows</a></li> <li><a href="/wiki/Windows_Services_for_UNIX" title="Windows Services for UNIX">Windows Services for UNIX</a></li> <li><a href="/wiki/Windows_SideShow" title="Windows SideShow">Windows SideShow</a></li> <li><a href="/wiki/Windows_System_Assessment_Tool" title="Windows System Assessment Tool">Windows System Assessment Tool</a></li> <li><a href="/wiki/Windows_To_Go" title="Windows To Go">Windows To Go</a></li> <li><a href="/wiki/WinFS" title="WinFS">WinFS</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Spun off to<br /><a href="/wiki/Microsoft_Store" title="Microsoft Store">Microsoft Store</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/DVD_Player_(Windows)" title="DVD Player (Windows)">DVD Player</a></li> <li><a href="/wiki/Windows_File_Manager" title="Windows File Manager">File Manager</a></li> <li><a href="/wiki/Hover!" title="Hover!">Hover!</a></li> <li><a href="/wiki/Microsoft_Mahjong" title="Microsoft Mahjong">Mahjong</a></li> <li><a href="/wiki/Microsoft_Minesweeper" title="Microsoft Minesweeper">Minesweeper</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" 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