Broni, thank you. I was able to install SOME updates, but not all, using the Firefox site you gave me. I finally took the computer to a tech repair place, and the guy was great. Working on his Ph.D. in computer science at UC Santa Cuz, and he's a helluva repairman. Still, it took him an hour and a half to find what he needed from Microsoft and get them to allow the updates. I sat with him the whole time and was very impressed, and grateful.
Thanks again. Problem solved!