Spybot - Search & Destroy

From Safer-Networking: Spybot - Search & Destroy can detect and remove a multitude of adware files and modules from your computer. Spybot also can clean program and Web-usage tracks from your system, which is especially useful if you share your computer with other users. Modules chosen for removal can be sent directly to the included file shredder, ensuring complete elimination from your system. For advanced users, it allows you to fix registry inconsistencies related to adware and to malicious program installations. The handy online-update feature ensures that Spybot always has the most current and complete listings of adware, dialers, and other uninvited system residents.

Version 1.3 adds enhanced immunization features, an improved interface, and integration of BrowserManager for spyware detection, plus the new Hosts File feature and bug fixes.