I'm getting a blue screen on start up and a code that says IRQL_nott_less_or_equal. I have been on this forum as well as other searching for An answer. I can't get into safe mode. I've done system restore and still nothing. I don't have any back up discs or windows discs. I have an hp compaq 8000 elite ultra slim desktop with intel core 2. Running windows 7. Any step by step help would be greatly appreciated!! I tried Microsoft online and they want like $295 to help.