Success! I'm posting this from the USB OS.
The fix. I was connecting through a Dell TB4 dock and that was the problem. I disconnected the dock and connected directly to the PC's USB C port and it booted.
Something else is happening. I was going to try an in place upgrade with my Win 11 USB flash drive but it told me it couldn't be done on the USB drive, I then decided to do a clean install, just to see if it would boot but it wouldn't allow that either.
The Win 11 install drive had just been...
Something happened the drive is totally corrupted. I have a Macrium full disc image and going to do a restore, tomorrow.
Anything I should do after or during restore?
I have an SSD from an old tower PC mounted in external USB-C enclosure that I would like to boot on my new laptop. When I try to boot from it I get an error screen that it needs to be repaired. Obviously drivers are an issue but if I can get it to boot I assume Windows will update drivers. I...
I've seen a lot of problems with older versions of Support Assist on the Dell support forums. Newer versions seem to be less of a problem, even with BIOS updates.
The POST (Power On Self Test) and Dell diagnostics are tied to SA. Think twice before uninstalling.
Done, thanks again for all the help.
Created new user, made the new user Administrator,
Restarted and logged in as the new user. Deleted my account.
Done!