PC Random crashes/BOD

FixJamiesPC

Commendable
Mar 26, 2016
1
0
1,510
I'm running a custom built PC which keeps randomly crashing/BOD

Build details (ask for more if needed)
OS - Windows 10
GPU - GTX 970
CPU - AMD FX-9590
MB - GA-990FXA-UD3
PSU - 600w 2nd hand
HD - SSD 2nd hand (OS installation location)

Crash messages so far:
- System service exception
- IQRL Not or Less equal
- KMODE exception not handled
- Kernel security check failure
- Random screen freezes in general

Fix's attempted so far:
- Security scan returned no indications of viruses/malware
- Temperature monitoring software indicates the GPU and CPU shouldn't be overheating
- Rolled back my Nvidia drivers
- Checked register for issues
The crashes have been going on for a few weeks now. I'm having trouble narrowing down the problem, any suggestions would be appreciated.