I rebooted my computer today for a clean install cause I've been having some connection problems and it has been running fine but I got a blue screen while playing a game. The blue screen really wasn't a problem it's the second one I've gotten in about half of a year with the pc. Anyway, I start up the PC and everythings running fine and I get this pop up saying go to <insert website here> and download this file urgent your computer has just recovered from a serious problem and needs to have this regestry program to scan for whatever. I sat here waiting for one to give exact words but it's not coming up. Anyway I went to the site and began to download it just thinking it was what it said it was, then I get another same exact thing different wording and a different website and realize it was something I've seen before, but Nod32 didn't pick it up as a virus, what do I do to fix these?