I was running the original 9.0 version with InCD and successfully backing up to DVD under XP Pro. I have uninstalled InCD, the original 9.0 and installed 3666. I had been making full backups to DVD and overwriting that file with each subsequent scheduled backup. The only "issue" I had was having to format each disk when new, using InCD. Now, when backing up as I had, I initially get the Error E0004000E: Operation is not supported, and by clicking "Format" the backup is made. However, on subsequent overwrites, I must again format. This is unacceptable as I must have unattended backups. Is the DVD being "closed"?