Windows 10: Intermittent bootloop and BSOD

DESKTOP-OCAR2IK-(2020-04-25_11-38-42).zip

My computer is intermittently getting stuck in a bootloop early on in boot sequence (just after UEFI BIOS settings option disappears with mobo logo and spinning dots). When it gets stuck in a cycle it repeatedly restarts, alternating between restart at mobo logo and 'automatic repairs'. It will occasionally freeze during these loops and need to be reset. Once every 20-50 restarts or so it will get through to windows. When it is in windows it will occasionally freeze or BSOD (with various reasons - see dumps), but sometimes run happily all day and be incredibly stable (like now when I'm posting this.) Some days it will boot straight to windows and be stable all day, but not very often.

Have tried new mobo, new RAM (though memtest86 on all RAM shows no errors), new PSU, reseated CPU, reset BIOS, updated BIOS, clean resintalled windows, it will also get stuck in the bootloop with no hard drive when trying to boot from usb win10 media. I have stripped all the way back to mobo, cpu and usb boot media and still get the problem.

The BSOD error messages arent' all captured in the dumps as I have clean installed windows a couple of times, but from memory they include:
IRQL NOT LESS THAN OR EQUAL
KMODE EXCEPTION NOT HANDLED
TRIED TO WRITE READ ONLY MEMORY
There were probably others too. Parameters and drivers are not consistent.

When stable, I have run prime95 (12hrs), intel CPU diagnostic, cystalinfo, furmark, HWInfo logging for multiple hours etc. None of these has shown any issues with hardware or temperature issues.

The only thing left I haven't switched out is CPU as I don't have a spare.

There seems to be no rhyme or reason to when it will bootloop and when it won't *Sad

Any help much appreciated.


Spec below:
CPU: intel i5-6600K
mobo: asus z270p
graphics card: nvidia GTX750 Ti
RAM: 2x corsair 8Gb DDR4 2133Hz 1.2v DS UDI (CT8G4DFD8213.16FA11)
SSD: Samsung MZHPV128HDGM
OS: Win10 1909 OS Build: 18363.778
PSU: Corsair CX600

:)

 

Sometimes computer enters boot loop, other times I see black screen

OK, thanks for the help. I will do what you suggested and try to reproduce my bootloop problem. Will come back to you with my findings.

You might have reasons for suggesting this, and I could just misunderstand them. But I just want to stress that it was never a BSOD problem for me, but rather a bootloop (The only BSOD that I got was a known issue with an incorrect version of COMODO). Also I installed Bitdefender just a few days ago, to replace COMODO.

 

Intermittent BSOD

I've been getting these intermittent BSOD's and I don't know why. I've been running the same settings that have proved stable through rigorous months of F@H/WCG and stability tests. My memory should be stable, I've tested it with Memtest86+ (the bootable ISO version). My CPU should be stable, I've tested it with 6 hours of OCCT Linpack. My GPU should be stable, it's ran F@H flawlessly for about 2 months now, and it's passed testing with Furmark and the OCCT GPU test.

I've undervolted my processor to 1.30v from 1.325v stock... I have put it back to stock voltage. We'll see how it goes.

 

Intermittent "Service abend" BSOD

All three of those modules are there. I'll try it without an elevated run.

Thanks