A friend of mine's computer was randomly locking up on him a few days ago so I went over to take a look at it. The system would freeze at the windows load screen most of the time, but sometime the OS would boot, then it would hard lock a minute or two later. We decided to try formatting and re-installing windows xp pro. Well, everything went fine until the installation got to "detecting devices". This is where the installation would lock up. Several times we received a "IRQ not less than or equal to zero" BSOD. I'm assuming there's some piece of hardware that's not initializing properly, but it's awfully difficult to tell. Are there any things you guys would check in particular with a situation like this?