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 3.00.1303 (28 Oct 2010):
- New CCleaner 64-bit native EXE.
- New UI graphics and icons.
- New internal SCanning architecture.
- New Drive Wiper tool SCreen under Tools section.
- New Intelligent cookIE keeping functionality.
- Improved support for IE9.
- Improved support for Google Chrome.
- Improved HTML5 Database Storage cleaning.
- Added support to clean MicROSoft Silverlight Isolated Storage.
- Added support for AVG AntiVirus 10.0, Audacity, LogMeIn Hamachi, BitTorrent and Windows Game Explorer.
- Improved support for Vuze.
- Added new environment variables: %SystemDirectory%, %SystemDirectory32% and %SystemDirectory64%.
- Improved Registry backup to address problems when saving values.
- Improved cleaning Windows Log Files for 64-bit OSs.
- Many UI improvements and bug fixes.

下载:CCleaner 3.00.1303