I never had a problem with playing backed up movies on my computer. I have a TDK DVDRW420N, it is the one that plays my back ups only. After I had backed up my last movie it says there isn't anything on it, even though I tried a few different things. All burns were "successful" according to CloneDVD and xcopy. I use winDVD 6-gold and The KMP player to play my dvds on my computer. Both will not play my newly backed up movie. They play fine on on JVC dvd player stand alone hooked up to my tv, vcr and stereo, but when I try to play it in the computer using my TDK DVDRW420N. I also reinstalled the firmware for it just to make sure and the other back ups work fine, just the most recent one. I'm using FUJIFILM DVD+R 120 4.7 16X. (I never had a problem with the blank dvds)Just a week ago my computer ran out of space (I was down to like 3gbs) and so I couldn't back up movies, because of not enough space, But I put lots of stuff on cd-Rs and now I have alot of space on my computer. (I have over 20 gbs on my hard drive)Before I never had the problem, except sometimes the movies I backed up worked better if I did the just the movie, unless it was one of those that needed the whole movie backed up that you needed subtitles on, because of the language being different. Could the blank dvds be defective? I don't have another kind to try. I tried to update my firmware, but it didn't work. any help would be nice... If the backed up dvd plays fine in my standalone, why doesn't it play in my TDK DVDRW420N? when both programs. (I did use anydvd) said the burn was successful, but when I click on the backed up disk in my computer it says it's empty and there is no data on it. I already tried reinstalling winDVD and The KMP player and it didn't work.