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 4.12.4657:
- Added Opera 15 and newer Saved Form Information cleaning.
- Added Opera Developer Channel support.
- Improved ActiveX and Class Issue Registry cleaning.
- Added Facebook and Twitter cookies to Intelligent Cookie Scan.
- Improved Scheduler management (CCleaner Professional only).
- Added Xilisoft Video Converter and DVD Ripper, dBpoweramp and SyncBackFree cleaning.
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Improved Internet Download Manager, Oxygen XML Editor, Orbit
Downloader, CA Anti-Virus, Microsoft AntiSpyware, and Vuze cleaning.
- Minor GUI Improvements.
- Minor bug fixes.
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