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。
hanges in CCleaner 4.08.4428 (25 Nov 2013):
- Added Firefox 27 new cache location cleaning.
- Improved Chrome cleaning: Flash cookies and last download location.
- Improved Internet Explorer and Firefox Startup Items detection.
- Enhanced Thunderbird and Firefox detection algorithm.
- Improved context menu management.
- Optimized system restore detection routine.
- Improved secure deletion of files with long filenames.
- Added advanced scheduled task management for Windows Vista and newer.
- Improved portable browsers management in Startup screen.
- Improved live monitoring notifications and settings (CCleaner Professional only).
- Added CyberLink AudioDirector 4 and PowerDirector 12, Adobe Photoshop Elements 12 and Premiere Elements 12, Nero Express 2014 and BackItUp 2014 cleaning.
- Improved Real Player, Real Player 15 and 16, Steam and Xfire cleaning.
- Minor GUI improvements.
- Minor bug fixes.
