CCleaner

 CCleaner is designed to optimize and to cleanse your system.
The software removes unused files from your hard drives, shortcuts without target, ActiveX controls, help files, registry entries, etc. to free up space and improve Windows loads. CCleaner is also able to erase all traces of your web browsing within seconds. The application deletes temporary files, history of visited sites, cookies, forms, etc. CCleaner supports Internet Explorer, Opera and Mozilla Firefox. Finally, the program can delete temporary records for many applications such as eMule, Kazaa, Google Toolbar, Office, Nero, Adobe Reader, WinRAR, etc. This new version is 64-bit compatible.