So there he was playing MCC and I had just finished Keyes (Halo CE legendary) and was pretty chuffed as the final cutscene started. But then, MID CUTSCENE i asked for an important update. And it's the sort that kicks you out if you press cancel. So He had to accept, and of course,his progress is wiped. The whole level. That's a few hours he can get back, this update was necessary but he's still mad.