Possible motherboard problem?

Update: I managed to get both OSes to install again with no problems by disabling the IDE prefetch cache in the BIOS, but everything I download is corrupted and I'm getting random BSODs again. So basically I'm back to square one.

holy hell, I think I may have fixed it!

I slowed the DRDY timing in the BIOS and ran SFC which detected some errors and fixed them with a reboot. Been running Prime95 ever since with no BSODs, lockups or restarts. I'll post again if anything arises. Thank you all for your help!

bah, Prime95 reported a hardware error about 45 minutes into the test and now it won't test longer than a minute without reporting a hardware error.

Now I'm getting IRQL_NOT_LESS_OR_EQUAL and the like on a barebones install. Just CPU, motherboard and hard drive.

I know the memory, motherboard, graphics card, sound card, hard drive, optical drives and power supply to be good. Now all I can think of is the CPU, but the temperatures have always been fine and there's no sign of any damage to it.

I installed it into the old PCChips motherboard and it's working like a charm, though.

The new board is an MSI PM8PM-V. I've read that it does not support the Pentium D 915, is that true?

You can make sure by checking out the mobo's CPU support list on MSI's website.