||This article needs additional citations for verification. (March 2013)|
|A component of Microsoft Windows|
Screenshot of Disk Cleanup in Windows 8
|Type||Disk maintenance application|
|Included with||Windows 98, 2000, Me, XP, Server 2003, Vista, Server 2008, 7, Server 2008 R2|
|Desktop Cleanup Wizard|
Disk Cleanup (cleanmgr.exe) is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files. There are a number of different file categories that Disk Cleanup targets when performing the initial disk analysis:
- Compression of old files
- Temporary Internet files
- Temporary Windows files
- Downloaded program files
- Recycle Bin
- Removal of unused applications or optional Windows components
- Setup log files
- Off-line files
The above list, however, is not exhaustive. For instance, 'Temporary Remote Desktop files' and 'Temporary Sync Files' may appear only under certain computer configurations, differences such as Windows Operating System and use of additional programs such as Remote Desktop. The option of removing hibernation data may not be ideal for some users as this may remove the hibernate option.
Aside from removing unnecessary files, users also have the option of compressing files that have not been accessed over a set period of time. This option provides a systematic compression scheme. Infrequently accessed files are compressed to free up disk space while leaving the frequently used files uncompressed for faster read/write access times. If after file compression, a user wishes to access a compressed file, the access times may be increased and vary from system to system. In addition to the categories that appear on the Disk Cleanup tab, the More Options tab offers additional options for freeing up hard drive space through removal of optional Windows components, installed programs, and all but the most recent System Restore point or Shadow Copy data in some versions of Microsoft Windows.
One should note that the actual amount of space gained may be only a small fraction of the amount indicated by Disk Cleanup. For example, on a tested computer Disk Cleanup indicates that 1,284 MB will be freed, but the actual result is 325 MB which is only 25% of the space estimated.
See also 
- Microsoft Help and Support - Description of the Disk Cleanup Tool in Windows XP
- The Elder Geek on Windows XP - Disk Cleanup Utility
- Creating a Disk Cleanup Handler
- Tweaking "Temporary Files" handler with registry