Couldn't really find any help on that site. Thanks for the link though.
The computer will not start in Safe Mode or regular mode. It leaves the same BSOD message. I have Hiren's Boot CD, and can start MiniXP there. I can then see my C:\ drive and its contents, but not sure where to go from there.
I'm thinking that I should uninstall the XP repair installation I performed that started all this grief. I think that KSecDD.sys is somehow messed-up based on the message in my original plea for assistance at the top of this thread.
I have restored the computer to the date before the problem appeared, still same results, BSOD.