well, I would try to get rid of that virus anyway because those are one of the worst type viruses out there. And who knows, the virus might have kicked in when the new upgrades were put in there. Afterall, that type of virus kicks in when the author tells it too, so the virus can kick in when you least expect it and cause this type of problem.
AMD 3200+ sckt 939
1 gig of corsair value ram
250 gig sata150 WD hard drive
Dynex 5.1 sound card
Evga 6600 256mb Pci-E video card