OK, curiouser and curiouser! I had run Autoruns in the past on my main machine, but never on the netbook. When I ran it, it found quite a few orphaned registry entries, mainly where the files they referred to were no longer on the system. I cleaned it all up and everything was fine. I still had the extra tabs in the Display Properties advanced settings window though. I finally looked more closely at the error logs from when they crashed, and it turned out that the culprit was "emgdg