CCleaner 是由 Piriform 所開發的一套免費的系統優化、隱私和系統清理的工具程式。可以幫您移除不再使用的檔案，以及無用的暫存檔，讓您的電腦可以騰出寶貴的硬碟空間，運作起來更加順暢、效能更佳！

　　CCleaner 可以清除不再使用的檔案，包含 Windows 系統本身所產生的檔案，Internet Explorer、Mozilla 等瀏覽器所產生的檔案，以及其它應用程式所產生的暫存檔，通通可以幫您清除；CCleaner 最好的部分是，它的速度快（通常採取低於第二運行）、不包含任何間諜軟件或廣告！

　　另外，CCleaner 還提供了清除登錄檔 Registry 的工具，可以幫您掃描所有系統應用程式，找出沒有使用的登錄檔及清除；刪除前告知是否備份，以供日後可以重新還原，避免誤刪重要的系統登錄檔。

CCleaner is our system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware!

Cleans all areas of your Computer
- Internet Explorer: Temporary files, history, cookies, Autocomplete form history, index.dat.
- Firefox: Temporary files, history, cookies, download history, form history.
- Google Chrome: Temporary files, history, cookies, download history, form history.
- Opera: Temporary files, history, cookies.
- Safari: Temporary files, history, cookies, form history.
- Windows: Recycle Bin, Recent Documents, Temporary files and Log files.
- Registry Cleaner: Advanced features to remove unused and old registry entries.

§ 授權方式：免費
§ 軟體語言：多國語言含繁體中文
§ 系統需求：Win7/Vista/XP/2000 32-bit/64-bit, Macs OSX 10.5 to 10.7 Lion.
§ 最新版本：v3.13.1600 (28 Nov 2011)
§ 官方網站：CCleaner
§ 檔案下載：下載1 下載2