Ok, just asking, cause upgrading with new cards that give the system more power requirements than the power supply puts out can do this.
I was getting this blue screen error, sometimes. When I checked the Windows System Log (which you can do in safe mode with command prompt [ c:\> EVENTVWR.msc ]), I saw a critical error at the exact same time as the bsod--a "Kernel Power" error, indicating the machine rebooted before it was actually done with the boot process.
I never did pinpoint my IRQL_NOT_LESS_OR_EQUAL error. I just reformatted and reloaded, with a slightly different order of loading my drivers. So far, so good. I haven't gotten the blue screen since 10/24/12
Check your Windows System log, if you can remember what time the blue screen happened.