My Sony DVD drive has quit working with any of my DVD playing software. Showtime says "cannot build graph." Media Player and Real Player just say "problem reading file." I can explore into the disc and play the VTS.vob file. The drive works for CDs and I can record onto it. I installed a new drive bought CinePlayer, and reinstalled all player software - same. Is Windows having trouble reading the .bup or .ifo files?