[QUOTE=alanfox;2095898]The PC is about a year old. It came with Vista Ultimate and I just downgraded it to XP Pro (with SP3). Other software burns DVDs just fine, the brand of DVDs being used were fine with Vista. I suspect that the issue is using a SATA drive under XP. Clone reads them fine (this was checked by attempting to play the files that were copied to the hard drive, which played fine). If I burn to a DVD RW there is no problem. Burned DVDs will play fine on a DVD recorder, but not in a player (the disk is unrecognized). Also if I put the burned DVD back in the PC, it thinks it’s blank.[/QUOTE]
Sounds like you are using the file system instead of the internal I/O file system. The Windows file system option is there so you can backup disks recorded on a home DVD recorder, to backup a commercially released DVD use the internal I/O system. That would explain why it plays in your DVD recorder and not recognized by your set top player. If you ripped it using the file system you may have to redo it using the internal I/O.