I really don't remember what I might have been doing just prior to the problem. It was already happening before I installed XP SP2, though. I have installed a few utilities from the Internet over the last few months, but I can't remember exactly which ones they were or exactly when they were installed. I had not installed any Windows updates during the time the problem started. I imagine there's a log file somewhere that would list my program installations, but I don't know how to access it. If there is, please let me know and I'll check it out.
I use sleep mode because my health isn't that good and I have to take several rest breaks from computing during a day's time. It's easier for me as I can simply disconnect the cable (and avoid hackers) and walk away, avoiding many slow shutdowns and startups. Actually, I'm just following the advice of experts in publications I've read. Is shutting down each time the best way?
I have a much newer CD/DVD ± R/RW drive I can install that, although not state-of-the-art, is XP compatible with driver upgrades available. If we're unable to pinpoint the CD problem, I can uninstall that drive and borrow the newer drive and see if it solves the problem.
Thanks for all the help.