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。
下载地址:
http://download.piriform.com/ccsetup533.exe
CCleaner 5.33.6162 Final:
Settings
– Fixed an issue where Automatic Update continued to inform users of an existing update after the setting had been disabled
Browser Cleaning
– Updated Edge cookie cleaning definitions to include new tables from Microsoft
– Fixed an issue in Firefox where extensions could not be deleted due to withdrawal of support for Netscape Plugin API
– Fixed an issue in Firefox & Thunderbird where cleaning ‘Site Preferences’ would also clean ‘Last Download Location’
Browser Plugins
– Browser Plugins list now saved as browserplugins.txt (not startup.txt)
Disk Analyzer
– Fixed an issue where analysis results did not display the full filepath
Stability
– Improved CCleaner launch sequence to resolve a UI lock