Well George, I think you have tried just about everything I would have tried except for mucking around in the registry. That is NOT something I would ever suggest someone to do though. I use my scroll/zoom in Corel all the time and I'm lost without it. If this were my computer, I would back it up and rebuild XP from scratch and be done with it, but I used to rebuild computers for a living in my prior life. That's quick & easy for me to do.
I read recipes the same way I read science fiction. I get to the end and I think, "Well, that’s not going to happen."