I'm running TI v10 in Windows XP and have never been able to backup my entire drive but have been able to backup specific folders with no problem. For months I've been doing daily scheduled differential backups to my WD 500gb MyBook with no problems. The last few days my scheduled tasks started failing with an Error (0x40003) in module 4 with a vague "Error writing file" message. The backup of the entire drive always gave me a bad media error (I've tested my hard drive using seatools and the Gibson utility and have corrected all bad sectors. I've tested the MyBook drive too). So today all my scheduled backup tasks failed with the same error. I then booted off the TI boot disk and was able to successfully complete a full drive backup for the first time and also complete a backup (this time a full backup) of one of the failed tasks. Why am I able to backup from the boot disk but not Windows XP? And why did the scheduled tasks start failing in Windows? Thanks for any help.