CCleaner是一款免費的系統優化和隱私保護工具。CCleaner的主要用來清除Windows系統不再使用的 垃圾文件，以騰出更多硬盤空間。它的 另一大功能是清除使用者的上網記錄.CCleaner的體積小，運行速度極快，可以對臨時文件夾、歷史記錄、回收站等進行垃圾清理，并可對注冊表進行垃圾 項掃描、清理。附帶軟件卸載功能。
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.