As you know, Windows saves a copy of more or less everything on your computer. Every Web site you visit, every picture, every video; it's all cached or saved or logged somewhere inside your PC. Apart from the security and privacy issues, all that stuff consumes storage and performance resources. A lot of tools promise to clean it all out, but few do. We looked at East-Tec Eraser 2011 from East Technologies, and found it to be a tool that can do the job. It cleans deeply, even files stored as Shadow Volume Copies; thoroughly wipes deleted files; alerts you to risks; runs scheduled cleanups; and cleans traces from all major (and many minor) browsers as well as messenger programs and other popular applications.