Corrupt registry hive, corrupt or missing OS file, or bad drivers are mostly the cause of Windows BSOD. Actually bad hardware is more rare. My experience during my IT consulting days.
I've seen too many systems which started to work fine after replacing a PSU.
As someone who worked L1 and L2 - %he major reason for BSODs is the faulty hardware.
My favourite story on this topic is when after a ~4 human hours of diag by L1 tech, I came to the client site, confirmed the BSOD, opened the case, straithened the SATA cable and the OS installed sucessfully.
EDIT: another one is the cheap PSU cut thr power too fast on the shutdoen, so the HDD never written 'good shutdoen' to the disk, triggering the scandisk on the startup. Fixed with a good PSU, BTW.
I thought the same. Till I bought a surface (first version)... BOY that thing was unstable. Was the last chance I gave to Microsoft. After that switched to Mac. Not coming back anytime soon.