I use for virus protection Microsoft Essentials
http://www.microsoft.com/security_essentials/ it's really great and free...then I have 2 other programs (free) I use and they are great. These are reccommendations from my computer tech guy and he uses them all the time....
Malawarebytes:
http://download.cnet.com/Malwarebyte...tag=rb_content;main
hope these help you and anyone else
Superantispyware:
http://www.superantispyware.com/