I have a one year old HD Box that seems to have trouble rebooting after updates.  This box is on a tv that in not used often so it's not a huge problem, but after every update it stays on boot for about 2 weeks or so then it is fine.  Now for the past week or so the box cycles between saying boot and a code F5E7.  I have tried unplugging both the power and the cable and leave it unplugged for some time but it doesn't help.