I got the occasional blue screen of death before, so I reset to factory settings. It didn't help, and may have made the issue even worse, though I haven't used the computer much since I just got a laptop. I have windows 7 64 bit. I had gotten the haplii virus (which redirects my google searches to a different site, it later changed to link to a different site instead) and failed to remove that completely, so I am not sure if that could be causing it or no.
I have tested the hard drive and RAM (using the built-in windows 7 memory utility, not memtest, as I have no blank CDs), and it isn't that.