I just used my DVD+RW disc to burn a movie for the first time. I had no hardware problems burning or playing. When I went back to try and burn another movie on it, Nero said the disc was not writable. The "Finalize Disc" option was checked so I'm thinking maybe I finalized it unknowingly the first time I used it. I'm trying to reuse this, I use it to test out my movies. Can the disc be definalized somehow? I thought they had to be finalized to work in your player?