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vevent"><caption class="infobox-title summary">O&O Defrag</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:OODefragIcon.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/9/9d/OODefragIcon.png/120px-OODefragIcon.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/9d/OODefragIcon.png/180px-OODefragIcon.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/9d/OODefragIcon.png/240px-OODefragIcon.png 2x" data-file-width="256" data-file-height="256" /></a></span></td></tr><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:O%26O_Defrag_10_Professional.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/0/03/O%26O_Defrag_10_Professional.png/220px-O%26O_Defrag_10_Professional.png" decoding="async" width="220" height="161" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/0/03/O%26O_Defrag_10_Professional.png/330px-O%26O_Defrag_10_Professional.png 1.5x, //upload.wikimedia.org/wikipedia/en/0/03/O%26O_Defrag_10_Professional.png 2x" data-file-width="369" data-file-height="270" /></a></span><div class="infobox-caption">O&O Defrag 14 Professional Edition running under <a href="/wiki/Windows_7" title="Windows 7">Windows 7</a></div></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">O&O Software</td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">28.0.10005 / March 19, 2024</div></td></tr><tr style="display:none"><td colspan="2"> </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"><a href="/wiki/Windows_NT" title="Windows NT">Windows NT</a></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/Defragmentation" title="Defragmentation">Defragmentation</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Shareware" title="Shareware">Shareware</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://oo-software.com">oo-software<wbr />.com</a></span></td></tr></tbody></table> <p><b>O&O Defrag</b> is a Windows <a href="/wiki/Defragmentation" title="Defragmentation">defragmentation</a> utility sold by <a href="/wiki/Germany" title="Germany">German</a> software developer O&O Software. It has won several awards<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> by PC journals and magazines, and is certified by <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a><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. (July 2017)">citation needed</span></a></i>]</sup> for all its current <a href="/wiki/NTFS" title="NTFS">NTFS</a>-based operating systems, including <a href="/wiki/Windows_NT_4.0" title="Windows NT 4.0">NT 4.0</a>, <a href="/wiki/Windows_2000" title="Windows 2000">2000</a>, <a href="/wiki/Windows_XP" title="Windows XP">XP</a>, <a href="/wiki/Windows_Vista" title="Windows Vista">Vista</a>, <a href="/wiki/Windows_7" title="Windows 7">7</a>, <a href="/wiki/Windows_8" title="Windows 8">8</a>, <a href="/wiki/Windows_8.1" title="Windows 8.1">8.1</a>, <a href="/wiki/Windows_10" title="Windows 10">10</a>, <a href="/wiki/Windows_11" title="Windows 11">11</a>, <a href="/wiki/Windows_Server_2003" title="Windows Server 2003">Server 2003</a>, <a href="/wiki/Windows_Server_2008" title="Windows Server 2008">2008</a>, <a href="/wiki/Windows_Server_2008_R2" title="Windows Server 2008 R2">2008 R2</a>, <a href="/wiki/Windows_Server_2012" title="Windows Server 2012">2012</a>, <a href="/wiki/Windows_Server_2012_R2" title="Windows Server 2012 R2">2012 R2</a>, <a href="/wiki/Windows_Server_2016" title="Windows Server 2016">2016</a>, <a href="/wiki/Windows_Server_2019" title="Windows Server 2019">2019</a> and <a href="/wiki/Windows_Server_2022" title="Windows Server 2022">2022</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Features">Features</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=O%26O_Defrag&action=edit&section=1" title="Edit section: Features"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>When required, the program checks the volume for errors before defragmenting.</li> <li>The defrag procedure can be scheduled for a certain time, or can be carried out when the PC is normally idle.</li> <li>The defrag can be run in the background so that the user hardly notices its operation.</li> <li>The defrag can be run in screensaver mode.</li> <li>Zone filing: categorize different files into different zones according to their levels of use and apply different methods to files in respective zones (a feature introduced in version 12).</li></ul> <p>There are five different defrag methods: Stealth, Space, Complete/Name, Complete/Modified, Complete/Access. "Stealth" is designed for use on PCs with large files and little free space, while the "Space" method is designed for heavily fragmented drives. The three "Complete" methods (Name, Modified and Access) sort the files on your drives alphabetically, according to date last changed, and according to date last accessed. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=O%26O_Defrag&action=edit&section=2" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Comparison_of_defragmentation_software" title="Comparison of defragmentation software">Comparison of defragmentation software</a></li> <li><a href="/wiki/File_system_fragmentation" title="File system fragmentation">File system fragmentation</a></li> <li><a href="/wiki/List_of_defragmentation_software" class="mw-redirect" title="List of defragmentation software">List of defragmentation software</a></li></ul> <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=O%26O_Defrag&action=edit&section=3" 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"> <div class="mw-references-wrap"><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 .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110721153726/http://www.oo-software.com/home/en/press/reviews/20070302.html">"CHIP magazine tests 6 Defragmentation programs: O&O Defrag V8.6 is once again the Editors Choice!"</a>. O&O Software. March 2007. Archived from <a rel="nofollow" class="external text" href="http://www.oo-software.com/home/en/press/reviews/20070302.html">the original</a> on July 21, 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">June 10,</span> 2011</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=CHIP+magazine+tests+6+Defragmentation+programs%3A+O%26O+Defrag+V8.6+is+once+again+the+Editors+Choice%21&rft.pub=O%26O+Software&rft.date=2007-03&rft_id=http%3A%2F%2Fwww.oo-software.com%2Fhome%2Fen%2Fpress%2Freviews%2F20070302.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AO%26O+Defrag" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=O%26O_Defrag&action=edit&section=4" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFYegulalp2003" class="citation book cs1">Yegulalp, Serdar (2003). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/windowsserverund0000yegu"><i>Windows Server Undocumented Solutions: Beyond the Knowledge Base</i></a></span>. McGraw-Hill Osborne Media. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-07-222941-1" title="Special:BookSources/0-07-222941-1"><bdi>0-07-222941-1</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Windows+Server+Undocumented+Solutions%3A+Beyond+the+Knowledge+Base&rft.pub=McGraw-Hill+Osborne+Media&rft.date=2003&rft.isbn=0-07-222941-1&rft.aulast=Yegulalp&rft.aufirst=Serdar&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fwindowsserverund0000yegu&rfr_id=info%3Asid%2Fen.wikipedia.org%3AO%26O+Defrag" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRoss2006" class="citation book cs1">Ross, John (2006). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/itsneverdonethat00ross"><i>It's Never Done That Before: A Guide to Troubleshooting Windows XP</i></a></span>. No Starch Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-59327-076-3" title="Special:BookSources/1-59327-076-3"><bdi>1-59327-076-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=It%27s+Never+Done+That+Before%3A+A+Guide+to+Troubleshooting+Windows+XP&rft.pub=No+Starch+Press&rft.date=2006&rft.isbn=1-59327-076-3&rft.aulast=Ross&rft.aufirst=John&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fitsneverdonethat00ross&rfr_id=info%3Asid%2Fen.wikipedia.org%3AO%26O+Defrag" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSinchak2007" class="citation book cs1">Sinchak, Steve (2007). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/hackingwindowsvi0000sinc"><i>Hacking Windows Vista: ExtremeTech</i></a></span>. Wiley. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-470-04687-6" title="Special:BookSources/978-0-470-04687-6"><bdi>978-0-470-04687-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Hacking+Windows+Vista%3A+ExtremeTech&rft.pub=Wiley&rft.date=2007&rft.isbn=978-0-470-04687-6&rft.aulast=Sinchak&rft.aufirst=Steve&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fhackingwindowsvi0000sinc&rfr_id=info%3Asid%2Fen.wikipedia.org%3AO%26O+Defrag" class="Z3988"></span></li></ul> <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=O%26O_Defrag&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="https://oo-software.com">Official website</a></span></span></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=O%26O_Defrag&oldid=1217902408">https://en.wikipedia.org/w/index.php?title=O%26O_Defrag&oldid=1217902408</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Defragmentation_software" title="Category:Defragmentation software">Defragmentation software</a></li><li><a href="/wiki/Category:Utilities_for_Windows" title="Category:Utilities for Windows">Utilities for Windows</a></li><li><a href="/wiki/Category:Windows-only_shareware" title="Category:Windows-only shareware">Windows-only shareware</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:All_articles_with_unsourced_statements" title="Category:All articles with unsourced statements">All articles with unsourced statements</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_July_2017" title="Category:Articles with unsourced statements from July 2017">Articles with unsourced statements from July 2017</a></li><li><a href="/wiki/Category:Official_website_different_in_Wikidata_and_Wikipedia" title="Category:Official website different in Wikidata and Wikipedia">Official website different in Wikidata and Wikipedia</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 8 April 2024, at 15:04<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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