Antivirus, anti-spyware, anti-spam, firewall. Protect yourself with Panda
Makers of antivirus and security software products for networks and desktop computers.
http://www.pandasoftware.com/


Free Antivirus Software
... antivirus sofware, evaluation antivirus software, and free virus removal tools. ... Free antivirus software may be the only option for those on a limited budget. ...
http://antivirus.about.com/od/freeantivirussoftware/Free_Antivirus_Software.htm


AVG Anti-Virus and Internet Security - Welcome
Offering the AVG Anti-Virus program for download, including a free version of the product. From Grisoft.
http://www.grisoft.com/


Antivirus Software for Windows XP, Vista, Me, 98, 2000, 2003, NT, Exchange and NetWare
Offers the Protector Plus range of antivirus products.
http://www.pspl.com/