Okay, I haven't had time to try everything suggested, because I'm having to swap CRTs around to have enough computers working when the kids are here.
But, let me tell you where I'm at and see if it rings any bells...
I can get to the 'safe mode' choice by F8, but...computer keeps looping on all choices except 'debugging mode'.
If I use 'debugging mode', computer seems to boot normally. Once I am logged in, things seem to work fine. I attempted to 'restore' computer to a couple of different restore points, but both times it freezes about 1/3 of the way through the restore process.
Anyway, that's where I'm at right now. I do have two similar computers that seem to work fine, so thinking next I'll try method #1 from the techrepublic.com article. Does it really have to be on a floppy (the computer doesn't even have a floppy drive...it does have a CD drive), or will it work the same off a USB thumb drive?
Thanks again for all the help.