suddenly my optical drive(s) are not working normally. I had only one but bought another one tonight to see if the unit was bad. 2nd unit is SATA, first is PATA. Both behave the same way. they do work normally in that they can read data and copy files to the hdd, etc, but they do NOT behave normally in the following ways: inserting a data disk doesn't cause the autorun to launch, nor do the normal choices for which app to run come up. All my movie ripping apps act like there is no movie in the drive, and once I put a movie in the drive, Explorer behaves badly, not showing any drives in My Computer, etc. Nero Speed Tools launch but never really run. No GUI ever appears, although the processes are in fact running. I feel that this is some sort of core driver type issue but don't know where to look.