Well, normally a BSOD has white writing splashed all over it saying various things. Normally they often occur when playing games. Due to the RAM and the GFX card being the most important parts for gaming, if they not good enough, your computer shows it in panic via a BSOD.
But seeing as yours just appears after a long amount of time left doing nothing, try putting on a screen saver, might stop the BSOD appearing, because ur computer would be concentrating on the screen saver, thus it won't go into BSOD. Try that, if that fails, come back and i try to help more.
maravich12 commented: I do too.(basketball) +2