Movie Burning Problem

Have been burning movies and torrents for years now. Useing both nero (for torrent)and dvdshrink and decrypter (for movies). About a week ago, now neither nero or dvd decrypter burns movies. DVDshrink will shrink movie. But decrypter will not burn it. Yet am able to burn CD's of music. Have both a internal and external DVD burner hooked up to my computer and same problem with both. Have tried other programs such as DVDFab, CloneDVD2 ImgBurn etc and still no luck. My computer processer is a Intel Celeron d 2.40Ghz. Memory (Ram) 2.00 GB, 32bit