I upgraded a computer for someone by installing a new motherboard, RAM, video card, and CPU.
Asus P8P67 Deluxe
16GB Corsair Vengeance (4x4GB)
Nvdia Quadro 600 (PNY)
i5-2500k 3.3GHz, 6MB cache

The hard drive is the same from the old rig.
When I boot, I can get to BIOS fine, but when I go to boot Windows (XP), I get a STOP error blue screen saying it might be problems with my hard drive or drivers.

This is under Technical information:

***STOP: 0X0000007B (0XBA4C3524, 0XC0000034, 0X00000000, 0X00000000)

I've talked to my father who is very knowledgable and has described a similar problem in the past. Despite his ability, he says he has to take it to a technician to fix it.

Anyone have any help or suggestions?

Did you format the old drive and re-install Windows fresh?

I'm trying to not reformat if possible, or at least as a last ditch effort.

It is not wise to use a hard drive with an OS loaded from another motherboard... That's why you are getting the stop error in the first place

Is there any way to get around it? It won't even let me reinstall Windows. I boot from the CD and after it finishes loading up some files, it gives the same stop error.

You probably have a bad memory stick. Run with just 1 4GB stick. If you can, try the modules 1 at a time. XP, 64-bit? Why XP and not Windows 7 64-bit?