Windows 7 My PC got a virus

[ericb982]

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?

 

[Joe S]

If you have access to another computer MS has a stand alone tool What is Windows Defender Offline? Try booting from that disk. Also did you try booting into safe mode and run AVG?
Joe

 

[ericb982]

Hey Joe,AVG will not run in safe mode and I only have a Vista laptop but it has no CD-ROM/DVD-ROMS. Any other ideas?

 

[Saltgrass]

The instructions for Windows Defender Offline, tell you how to make set up a Flash Drive you can use.

 

[ericb982]

Thanks, Saltgrass. I will try this ASAP.