What do the codes in this bug check mean?

If you can post the dump we may be able to help.

Try this:  Pull the system drive out, take it to another system, attach it there and make a copy of the dump file.  

This started suddenly about 3 weeks ago,nothing new was installed,  it's rebooting more frequently now.

A BSOD which becomes progressively more frequent suggests a hardware problem which is becoming worse.

Also:

a) Download a copy of Memtest-86/+, boot it on the system and let it run for at least 12 hours.  This will not completely rule out memory problems (because the problem is intermittent) but it will give some assurance that the memory is not failing.  There are two versions; run them both.

https://www.memtest.org/

https://www.memtest86.com/

b) Download a temperature monitoring program and see what the temperature of the CPU and hard drives is, e.g., Open Hardware Monitor.

https://openhardwaremonitor.org/

what happens when you try to copy the dmp file at  C:\Windows\Minidump\121019-14648-01.dmp  ?
it should be accessible.
if not, try accessing it in safe mode, or hook the drive to a working PC to copy the file

Thank you both!

Dr. Klahn, the system is in production as a server for dental office software, can't take it down for that long until the weekend, Will see what I can do.  Dell diags (took 2 hours) and came up clean.

Nobus, file copying gives access denied.  I

Both, I can't really risk messing around too much with the drive until I have a replacement solution in place. But will follow up with your suggestion when I do.

check event viewer - it may have more info

I did that already, that's where the bug check codes came from (same info as appears in the BSOD notice), there is no more info than that, other events that refer to processor speed, power settings, all led nowhere.  Hard to fathom how there are so many sites with bug code translations, but none of them are really definitive, and none have the FFFF800020A67DE.

then i suggest to update all drivers and bios

Hi,

I agree, I would not update the bios or drivers. - too risky.  I moved the critical application to a different machine so they are working fine now.  I will still tackle the old machine because it is still under warranty, so if I need to get parts replaced, I will.  And, i want to know what the problem really is.

I'm closing this.

Thanks for your suggestions.  I appreciate your taking the time to answer