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 5.32.6129 (11 July 2017):
Browser Cleaning
Updated Firefox History cleaning definitions to correctly remove items with associated favicons
Updated Chrome History cleaning definitions to restore removal of ‘Other Search Engines’
Restored support for cleaning ‘Last download location’ in Edge
Restored support for cleaning ‘Last download location’ in Firefox
Windows Cleaning
‘Recent Documents’ rule no longer removes items that have been ‘pinned’ in MS Office applications
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