I have a Dell Gen 4, 3.4 GH, pentium 4 process, 2-74 GB hard drives. I decovered a trojan horse that I though I remove, however, when I try to play any of my games the computer automatically shut down.I thought I have a Video probem, but I reunstalled all video drivers reload window and I still have the same problem. I don;t know if the registry got changed or what.

Does anyone have any suggestion on what I can do to solve this problem.