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。
Changes in CCleaner 5.38.6357 (December 12, 2017):
Browser Cleaning
Edge: Session clean no longer removes set-aside tabs
Chrome: Added support for cleaning cookies from Local Storage
Cookies
Chrome Local Storage Cookies can now be managed from Cookie Manager
Windows
CCleaner no longer cleans the list of files waiting to be renamed (PFRO.log)
Installer
Fixed ‘Error opening file for writing’ error
General
Fixed a library dependency that was preventing CCleaner from opening on Wndows XP in some cases
Fixed a rare case where CCleaner could check for updates multiple times in a short space of time
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