Hi Phil,
I'm Paul, an Independent Advisor. I hope I can help you with your concern.
The minidump files didn't name any driver. It only indicated a system kernel driver "ntkrnlmp.exe". Since it's a system file it means something else drove it into a fault. It could be hardware, software, or driver.
I recommend that you run Driver Verifier to find any misbehaving, corrupted, or outdated driver.
Follow the instructions from this article.
https://www.tenforums.com/tutorials/5470-enable...
Reminders:
=> Disable Driver Verifier after 48 hours or after receiving a BSOD.
=> Create a Restore Point before running Driver Verifier.
Share the minidump file once you receive a BSOD error.
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