Thanks, guys - msconfig did it.
I wish I could figure out why this scanner won't work, though. It is a Umax 2000U - USB. I followed all instructions, but it won't scan. It seems to recognize the scanner, but won't test properly. I tried all the suggestions in the Troubleshooting, but no luck. I wonder if it won't work with XP Professional? It is about 3 years old, though in new shape. Went to the website of Umax, but no help there.
I'm about ready to let one of you guys have it to see if you can get it to work. If you can, keep it and pay me $20 plus shipping. Any takers?