CCleaner是一款免费的系统优化和隐私保护工具。CCleaner的主要用来清除Windows系统不再使用的垃圾文件，以腾出更多硬盘空间。它的另一大功能是清除使用者的上网记录。CCleaner的体积小，运行速度极快，可以对临时文件夹、历史记录、回收站等进行垃圾清理，并可对注册表进行垃圾项扫描、清理。附带软件卸载功能。下载:CCleaner v2.20

[28th May 2009]
CCleaner v2.20
- Added support for Google Chrome recently closed tabs.
- Disabled removal of most recent System restore point.
- Fixed bug with Internet Explorer 8 Compatibility View settings.
- Improved uninstaller support for Windows 7.
- Enhanced right-click menu options for Cleaner screen tree.
- Added extra information under title for Options and Tools screens.
- Added right-click menu to Registry screen tree.
- Added support to multi-select items in Include, Exclude
  and System Restore screens.
- Added language support for Estonian and Farsi.
- Internal 64-bit improvements.
- Minor bug fixes.