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 4.05.4250 (26 Aug 2013): - Added Windows Server 2012 R2 Preview support. - Added Windows Event Log cleaning. - Updated Intelligent Cookie Scanning. - Improved behavior when removing System Restore points. - Improved Windows XP last download location cleaning. - Enhanced the File Finder function keyboard navigation. - Improved privacy data cleaning for multiple users in Internet Explorer 11 (CCleaner Professional). - Improved the time interval options for system monitoring (CCleaner Professional). - Updated exception handling and reporting architecture. - Added Adobe Premier Pro CC, OpenOffice 4, CuteFTP 9, and Directory Opus 10 cleaning. - Improved Foxit Phantom PDF and QuickTime cleaning. - Minor GUI improvements and bug fixes. CCleaner 4.05.4250 CCleaner for Mac
