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.
CCleaner is a freeware system optimization, privacy and cleaning 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. Additionally it contains a fully featured registry cleaner. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware! 
官方网站：www.ccleaner.com
界面预览：Screenshots
Download：下载页面；CCleaner [exe,安装版]；CCleaner Portable[zip,便携版]