clamwin

ClamWin protects email, instant message downloads and files by scanning and removing viruses and Spyware. ClamWin will protect email and instant messages and supports all email and instant message programs, and also protect against Adware and Spyware and with frequent updates is able to cope with new threats as they are released. Antivirus and antispyware scanners provide automatic file protection and with unlimited virus definition updates.

MS Windows front-end to Clam Antivirus (http://www.clamav.net). Includes scheduler, virus database updates, standalone scanner, context menu integration to MS Windows Explorer and Addin to MS Outlook. Also features easy setup program.