nope, I was thinking of a malware tool -none in particular - burned to CD, that Essexboy may suggest if you can’t boot Windows at all. As to your Windows DVD, it doesn’t contain any malware diagnostic tool. Your repeated BSOD’s just mean that some drivers have been involved/broken etc… What would be interesting would be your latest memory dump (generated when BSOD occurs ). Not sure if that’s needed… such files are big, must be compressed and uploaded to a server to be diagnosed. They’re located directly under your Windows directory and called memory.dmp You might be able to grab a copy of yours by inserting your hard disk in another computer, but there’s a risk to infect the other computer (not with the dump file, but with the infection that you described). Can also be done using your Windows DVD, go in repair mode, list your Windows directory and copy the file to an external drive. You should also have a minidump file, much smaller and located in Windows\Minidump But don’t bother yet, as again this might not be needed at all.These dump files won’t tell what sort of infection affected your system but might tell what was affected, and that’s a lead.