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 3.20.1750:
- Added Windows Explorer Context Menu management to Startup tool.
- Added Windows 8 Release Preview compatibility.
- Added Opera 12 support.
- Updated History cleaning for Aurora.
- Updated History cleaning for Chrome Canary.
- Improved UAC bypass code.
- Improved accuracy for uninstall items installation date and size.
- Improved Scheduled Tasks detection.
- Improved cleaning algorithm duplication detection.
- Improved file and setting removal when uninstalling.
- Minor bug fixes.

下载:CCleaner 3.20.1750