Okay, so I recently completely reformatted my PC. I am running Vista and had been having problems with my computer running really slowly, especially after I had bought and installed Fix It Utilities. Well, after reformatting I went and installed AVG Free and Ad-Aware, both of which I have used extensively in the past. I set the AVG to scan nightly and use the Ad-Adware daily. Well, I thought it weird that my laptop was turned off every morning as I have the AVG set to scan at 4am (I have insomnia, so I stay up pretty late anyway). I thought nothing of it because even though Internet Explorer was being a pain, I had downloaded Safari for PC and it was running great. Well, this morning I downloaded something awful and knew I shouldn't have, so I deleted it and thought I would just scan my computer, just in case. I started both AVG free and AD-Aware, which I have done routinely in the past. Both started just fine and I moved to my fiance's laptop so that I could continue with my online schoolwork. About 45 minutes into the scan, my computer shut off. Now I know it can't be Ad-aware because I use it daily because the free version cannot be set up to scan on a schedule. The thing is, I know there is obviously a problem with my computer if the virus scanner doesn't work properly. Any suggestions on what I can do without having to reformat the computer again?