I have scheduler set to run two back up tasks TI 2009 - make backup image to two different locations - both have run successfully until today. The one set for 11:00am today failed with this message - I don't run this PC with any password logins and although UAC is set to "on" I have already completed a number of successful backups to this location using this scheduled task. Anyone any idea why today should be different? The one set for yesterday completed without incident. I have run todays from the scheduler under "run task now" and it has completed -incremental and validated without incident?