Hello
Four fatal hardware events were detected in the logs - three on the 23rd and one on the 22nd but no crash dumps were written. All you can do is systematically work through the hardware and test each components either with software diagnostics or by physically swapping components. I am not sure what you have available for swap testing, please let us know.
Diagnostic checks can include:
Hard disk:
Hard Drive (HDD) Diagnostics (Sea Tools for DOS) & SSD Test
CPU:
CPU STRESS testing: Mersenne.org Prime95 and Intel Processor Diagnostic Tool (IPDT)
RAM:
Test RAM with PassMark MemTest86
GPU:
FurMark Display Card Stress Test
PSU: best to test by swapping for a known good one.
Motherboard: best to test with a swap if you can get hold of one.
How old is the PC? Is it still under warranty?
What did you do two weeks ago to the PC before this started?
Look back in Reliability History (type into search to find it) to see what drivers were updated or if any software was added.