Hello. I am facing a blue screen error with the message IRQL_NOT_LESS_OR_EQUAL in windows 7 and the system has failed to start. The system recognizes CD-Rom and runs Windows 7 but restarts again. I am able to reach all the boot options including Safe Mode by pressing F8 button but safe mode also does not works. Windows 7 was reinstalled on the same hard disk day before yesterday on a different system and it worked. Don't know if it is a mother board issue or some cable fault. Please advice.