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。

下载:CCleaner 2.26.1050
- Added support to clean Windows DNS cache.
- Added vacuum SQLite databases for Firefox and Google Chrome.
- Added publisher and version to Uninstall tool.
- Added Taskbar jump list tasks for Windows 7.
- Added Taskbar Progress for Windows 7.
- Improved Exclude list registry keys addition functionality in 64bit Windows 7.
- Improved Registry Cleaner detection algorithm and 64-bit file system redirection.
- Improved "Save to text file" functionality in Cleaner screen.
- Improved system tray icon activation and tooltip.
- Improved Registry screen "fix selected issues" dialog usability by removing prompt.
- Further improved RECURSE and REMOVESELF functionality.
- Improved Uninstall screen detection algorithm.
- Improved memory usage to avoid GDI leaks.
- Fixed issue with Sticky Notes being detected as Missing startup item.
- Fixed "Edit" and "Remove" button availability on Include/Exclude screen.
- Fixed various GUI bugs.