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。http://download.piriform.com/ccsetup303.exe

v3.03.1366 (25 Jan 2011) - Added K-Meleon browser support.
- Added Rockmelt browser support.
- Added Chrome Plus browser support.
- Added Saved Password cleaning for all browsers.
- Added cleaning for multiple profiles in Google Chrome.
- Added Recent Search History cleaning for Safari.
- Added cleaning for Adobe Acrobat 9.0 and 10.0,
Shockwave 10 and 11, Daemon Tools, Compare It!
and Microsoft Search Helper Extension.
- Improved Autocomplete Form History cleaning for IE9.
- Improved Saved Form Information cleaning for Chromium based browsers.
- Improved Internet History cleaning for Opera.
- Improved Internet Cache cleaning for Firefox.
- Improved cleaning for Silverlight and Adobe Reader.
- Improved Office 2003 and XP to prevent removal of autocorrect settings.
- Added more Windows MRU cleaning rules.
- Added Belarusian translation.
- Minor UI tweaks and fixes.