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。
– Added FTP Account cleaning.
– Added support for Paint Shop Pro X3, VLC Media Player, MediaMonkey, Winamp, Malwarebytes Anti Malware, Avast! Antivirus and WinPatrol.
– Improved support for Quicktime Player, Ad-Aware and AntiVir Desktop.
– Added support for Firefox based browser Pale Moon.
– Improved support for expanding environment variables %ProgramFiles% and "%CommonProgramFiles%" to both 32-bit and 64-bit folders.
– Added new environment variables: %ProgramFiles32%, %ProgramFiles64%, "%CommonProgramFiles32%", "%CommonProgramFiles64%".
– Splitter bar is no longer misbehaving when cleaning is in progress.
– Improved navigation using keyboard.
– Fixed bug in Startup Tool on Windows 2000.
– Minor tweaks and fixes.
