I have had this before and thought it was a one off. When you look at the list of recently recorded programs they have not recorded or even listed and the background message "deleting" is showing. When you go to settings the option to format the hard drive or perform a factory reset is not available. The last time it happened 6 months ago Humax Direct changed the unit suspecting the 1 Tb hard drive. I did the switch off and back on again after 30 seconds and eventually formatted the drive and all is OK. Anyone else had this problem ?