What is the stop error (the numbers)? Do you have the OS set to display the Blue Screen? Obviously it doesn't say which driver is causing the problem (right?), so you should start by focusing on the drivers you have modified or changed recently. I assume the only ones you changed recently are the display drivers, if so do you use a driver cleaning program like Driver Cleaner Pro or The Guru of 3D's nvHardPage bundled nvidia cleaner? If you do not, I HIGHLY recommend doing so. Also if you have done those things or do them regularly (which you should with drivers that change frequently) you can try MS Driver Verifier. Type "verifier" in the run command box (no quotes). I've found that it doesn't play nice with Creative Labs X-Fi drivers, so be aware of that.