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 4.13.4693:
- Added Windows 8.1 Update 1 and Server 2012 R2 Update 1 compatibility. 
- Improved Chrome cleaning: Internet History, Last Download Location and Startup item management. 
- Improved Opera 15 and newer cleaning: Internet History, Last Download Location and Startup item management. 
- Added Firefox plugin activation mode support. 
- Improved handling of removed and unmounted disks. 
- Improved Windows keyboard shortcut support. 
- Improved Shutdown after cleaning and /AUTO command-line. 
- Added Wondershare Video Converter Pro, Aimersoft Video Converter Ultimate, Real Player Cloud cleaning. 
- Improved Java, Windows Defender, FrostWire, CuteFTP 9, Winamp, FileZilla, SUPERAntiSpyware, OpenOffice 4 cleaning. 
- Added Mongolian language. 
- Minor GUI Improvements. 
- Minor bug fixes.

下载地址:

http://download.piriform.com/ccsetup413.exe