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 5.42.6495 (April 23, 2018):
Browser Cleaning
Internet Explorer: Fixed a bug where cleaning Temporary Internet Files left some files behind
IE/Edge: Enhanced cleaning of YouTube viewing history
Cookies
Search terms are now highlighted in the results list
General
Where appropriate, CCleaner Free may recommend improvements to your system’s antivirus protection
Installer
Fixed an issue where localized text was overlapping in the Professional Edition installer
下载地址: