Repeated Freezing/BSOD with no explanation

[Borckly]

My roommate's PC has been experiencing Freezes repeatedly that have only gotten more frequent over time. The freezes are at random, occurring during games or after performing actions such as clicking on links, opening applications, etc. Sometimes the computer freezes and it requires him to completely turn off the rig and turn it back on. Other times it will display a blue screen and most of the time it will display the following error: IRQL NOT LESS OR EQUAL. He recently got the CPU looked at and fixed by a technician because it was giving him problems with frame rates, so we don't think it's that and I'm not comfortable enough with my thermal pasting abilities to want to switch his processor out with mine. The hardware temperatures appear to be normal.

 

Here's a list of things we have tried:

-sfc scan

-Clean windows install

-Replacement of RAM

-Hard Drive replacement (He historically had problems with freezing on a previous build that used the same hard drive)

-Fresh install of windows on new hard drive (actually crashed during setup)

-Uninstalled and reverted drivers

 

If you guys have any ideas as to what I can do or what you think it is, please let me know.