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。
Changes in CCleaner 4.09.4471 (19 Dec 2013):
- Added Google Chrome v32 cleaning and startup management.
- Added individual cookie cleaning from Cookies screen.
- Improved Internet Explorer 11 DOMStore cleaning.
- Added Shutdown after cleaning option.
- Improved Live Monitoring notifications (CCleaner Professional only).
- Added Alcohol 52%, The Bat and Nero 14 Platinum HD cleaning.
- Improved Camfrog Video Chat, Alcohol 120%, Adobe Fireworks 6.0, Nero 12 Platinum HD Suite, Nero Video 11 and eMule cleaning.
- Minor GUI improvements.
- Minor bug fixes.
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