On the bottom of your post it shows some hardware, is that the computers actual components? Your problem sounds more hardware related than virus related. If you have an extra video card or memory stick laying around you might want to try them. From my experience with virus/malware, once you reformat the drive it's gone. I've never had one survive the reformat or survive in memory and I've had several times I've had to resort to a reformat. Sometimes just removing a memory stick can fix the problem, the computer will run fine on 1gb of memory.