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 3.19.1721:
- Added option to skip User Account Control (UAC) warning.
- Added support for Firefox 13.0 beta.
- Moved Thunderbird to be cleaned separately.
- Improved Aurora History cleaning.
- Improved Google Chrome Saved Passwords cleaning.
- Improved Scheduled Tasks detection.
- Improved Uninstaller Installation Date on XP.
- Added cleaning for BitDefender.
- Improved detection for Malwarebytes Anti-Malware, VLC Media Player and Avast! Antivirus 6.