My notebook came back from the repair shop today with a new hard drive and system board. I didn’t think the drive needed replacing, but they said it was noisy, and this one is indeed quieter. The system board replacement took care of the USB problems as far as I could tell from a short test with a borrowed USB mouse. I’m reinstalling Windows XP Professional properly now and will run more tests with the game pad too, which means Microsoft Flight Simulator 2002. If it works out I can start thinking about USB Audio devices.