Scan Doctor seems to have fixed it, Waterboy71!
I am a bit hesitant to speak too soon, but so far so good.
The only problem I see so far is that Scan Document Settings is missing "scan to PDF" option.
It has bmp, tif, gif, png, and pcx, but no PDF.
It was there before all this, before I did all the uninstalls/reinstalls.
I did some research online and read that I had to have Adobe reader, which I reinstalled (I may have possibly uninstalled it when attempting to isolate the problem). I have Adobe Reader 8, and installed it about a week ago, way before the latest HP installation.
Any suggestions on how to get "scan to PDF" back?
Thank you so much for all your help. I'm going to test it further tonight.