I have a pioneer ao5 dvd writer and it's always work great for me. Can someone advise me or send me in the right direction to solve my problem. I have been alway able to play all dvd movies in my pioneer ao5, I would like to make a back-up of my orginal copy of "a nightmare on elm street" put when I put in to play the movie in my PC it changes my default and won't see the disc. it works find in my dvd stand alone. has this everhappen to someone else. never had a problem like this before.