CCleaner是一款免费的系统优化和隐私保护工具。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。
同时支持IE、Firefox、Oprea等。
免费使用。不含任何间谍软件和垃圾程序。
支持包括简体中文在内的31国语言界面！
Last updated on 28th April 2008
Over 140 million downloads!!!
CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system – allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware! 🙂
[28th April 2008]
CCleaner v2.07
– Firefox 3.0 support added.
– Fixed bug where figures were missing for KB/MB sizes.
– Fixed bug where some IE cookies were being missed.
– Improved scan time accuracy.
– Internal memory management improvements.
– Registry settings moved to HKCUSoftwarePiriformCCleaner.
– Fixed bug where CC could get locked in System Tray.
– Renamed MSN Messenger to Windows Live Messenger.
– Added MS Office Picture Manager to applications.
– Fixed uninstaller tool bug on 64-bit OS.
– Minor GUI improvements.
– Minor bug fixes.