And I appreciate his help. I don't want to waste his time (or for that matter anyone else's) asking questions I can find my own answers to but sometime there is SO MUCH info that I need help sorting things out. I've set up an intranet web server on a Raspberry Pi for our shop but given some reliability issues with the SD cards on those I'd like to move that to a better platform such as an older full fledged PC running Linux.
Had the same issue with an older laptop. There is a program that won't let any other OS load. My IT guy says it's not at all unusual to see that. It's all magic to me!