If you are sure the unit is not recording, and with unit in standby.
1. Insert usb stick into front or rear usb socket.
2. Press and hold channel down on front of unit whilst pressing the standby button simultaneously.
3. Update should then commence, if you have your tv on you should see the progress.
4. When complete 'end' will appear on the front display, and a message on TV screen will advise you to reboot.
5. Remove usb stick and press standby button to reboot.