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 4.06.4324 (25 Sep 2013):
- - Improved Internet Explorer DOMStore cookie cleaning.
- - Enhanced Firefox Internet History cleaning.
- - Added free text entry for include and exclude items.
- - Optimized Startup tool browser detection.
- - Updated procedure for recursive folder analysis and cleaning.
- - Improved system monitoring startup procedure (CCleaner Professional).
- - Added CDBurnerXP, UltraEdit, Photodex ProShow Producer, SketchUp Make 2013 and HandBrake cleaning.
- - Minor GUI improvements.
- - Minor bug fixes.