Also available:
CCleaner Standard
CCleaner portable (Take it on a USB stick with you)
CCEnhancer (Adds support for over 270 new programs to CCleaner



CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure. Easy to use and a small, fast download.

Features:

Cleans the following:

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 entries, including File Extensions, ActiveX Controls, ClassIDs, ProgIDs, Uninstallers, Shared DLLs, Fonts, Help Files, Application Paths, Icons, Invalid Shortcuts and more... also comes with a comprehensive backup feature.

Third-party applications

Removes temp files and recent file lists (MRUs) from many apps including Media Player, eMule, Google Toolbar, Netscape, Microsoft Office, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and many more...

100% Spyware FREE

This software does NOT contain any Spyware, Adware or Viruses.

Editor's Note: Slim is released a week after the standard and portable builds which include an opt-out toolbar. The Slim version does not contain the toolbar.