Okay, I need some help. Usually, I am good with computers, but this time I screwed up. I got a virus on my pc. So far, all it seems to do is take FOREVER to log in, give me a black screen after logging in for 5 minutes, remove SP2 (still in windows 7 SP1) and make the CPU usage 100% (I am assuming it underclocked my processor) AVG free 2013 is REFUSING to scan, and will not let me install anti-virus. My current specs are as follows: RAM: DDR 2GB GPU: EVGA 8400 GS CPU: Athlon 64 3500+ (clock unknown, it is normally 2.2 GHz) PC: HP pavilion a1130n OS: windows 7 ultimate SP1 anyone who can help me?