Have used my dvd burner for years and have burnt many movies. All of a sudden it quit reading dvds. I've been using Nero 6 and PowerDVD, I tried uninstalling and reinstalling software and this doesn't help.It won't read original dvd's either. I read something about a dvd decoder may be missing. Does anyone have any sugguestions on what I need to do or install to make my drive to work? Thanks.