After 2 weeks of working, backups suddenly kept failing with error relating to volume of backup drive being unavailable - retry/cancel etc. Deleted all backup files and tasks, and now completely unable to do any backups (even first system state backup). Backups fail at end of Stage 1 - "Creating Image" Error message is simply "Operation Failed", log gives 2 following lines: "Operation with partition "2-0" was terminated. |Details:|MFT bitmap corrupted (0x7001| Tag = 0x89D94B01B483E192" "Operation has completed with errors" Formating backup drive F: and restarting has no effect. Any ideas please? Currently running Build 9709.