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 5.41.6446 (March 13, 2018):
UI
NEW! Cleaning results now displayed as a Cleaning Summary (Free and Professional versions only)
NEW! Product tips to help users discover less visible features
NEW! Fresh, clean Upgrade page design
Browser Cleaning
Edge/Internet Explorer: Fixed cleaning of cookie and icon file types on Windows 10 (thanks alhazred & Judesman for reporting this via our forum!)
Localization
Added improved Estonian translations (thanks to our volunteer translator ProPaan!)
Technology
Added support for Sciter: a lightweight, embeddable HTML/CSS/script engine for modern UI development
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