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。
CCleaner 4.10.4570 (23 Jan 2014):
- Improved Firefox 26 cleaning.
- Improved Firefox extension management.
- Improved Shutdown after cleaning and /SHUTDOWN command-line.
- Added new cleaning scheduler (CCleaner Professional only).
- Added Facebook Metro, Picasa 3, Spotify, Wondershare Video Converter Ultimate, Kingsoft Office 2013 and Sublime Text cleaning.
- Improved Audacity cleaning.
- Improved localization and language support.
- Minor GUI improvements and bug fixes.
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