This is exactly what I continue to experience with my XP pro too. Sure would like to fix this, I even tried to do a "repair install" of XP pro but it failed three times. Failed as in would not complete and reboot correctly I would dearly love to have an answer other than a complete install which would cost me many programs and data unless I made a career out of that project. This is a Photo and Video Editing work station so the flash drives are really important. BTW all external HDD and other equipment work fine.