Since I can't copy and paste the quote below for editing, I'll be doing my replies a bit differently.
(1) How important is that image to you? I'm out of preliminary ideas on what went wrong with restoring it & would have to go hunt for more
It's not important at all! LOL That's why my two mini computers are "test" machines. Having to start all over because things fail miserably has always been an acknowledged possibilty.
(2) "Mounting an image like this would be interesting to learn, but it doesn't meet one of the current goals, simple and easy to do for a newbie. So that will have to wait."
Thanks for tine information. I've clipped your instructions for this reply, but I did print just the instructions from your message for later experimentation.
(3)
(a) Well, what is the error message you get when you try to boot that rotten computer?
(b) Did you try "Troubleshoot > Advanced Options > Startup Repair"?
(c) Actually, we may be able to access its files at a Command Prompt in the recovery environment.
No operating system found.
And it's just getting worse! LOL With this last OS install, I created a Recovery flash drive no system files from the control panel. Attempted to boot from it. Message? "No operating system found". Plugged the flash drive into a different computer. No problem, booted fine.
Tried to create a Recover flash drive using the latest install. Wouldn't create the drive.
Mind you, both flash drives worked fine before this last clean install of 20H2.
Who wants to have to deal with things like this? No me. LOL So thank you very much, at this point I'll stick with my Mac. <G>