New
#21
Remove your hard drive and see if the problem still is there/their.
Seems to definitely hardware related.
Some hardware tests to run.
Graphics card test:
Video Card Stress Test with Furmark
Hard drive(s)test(s):
Pick one for your HDD brand or use Seatools.
7 Free Hard Drive Testing Software Tools
RAM (memory) test:
This will require memtest on a bootable CD or USB stick.
RAM - Test with Memtest86+
I asked in post #14 if Raid was being used and never got a answer so I though removing (unplugging) the hard drive would be a good test. It might help point us in the right direction.
Update.
In the end I gave in and just bought a new z77 motherboard and reinstalled windows and its fine. I think it was driver issues but I had other problems so decided on some fresh hardware.