I know this is an old thread but thought I would offer a different reply.
I c0cked something up in my duo2 after playing with kodi and tried to re-install from a backup. Got half way thru then started looping on the error message of the background check.
Kept counting down to 9 then starting again, no keys would work. Couldn't get out of it until I did a hard reboot with the box power key on the remote. Box rebooted, and was fine after that.