Pray for all 3 episodes of LOTR on TV, u'll have the time for it.
I'm not subscribing to the hateful attitude about this.
The pre-patch took about an hour, so I figure an hour or so, most likely.
If I'm undeservedly lucky, they'll have found and fixed the problem, so that it won't delete the files by the time I go to do it. But I'm not even hoping that will happen, much less actually expecting it.
Stuff happens. Especially with complex systems. You either roll with it, or get rolled over.
(And I have the entire extended collection LotR disc set. It's wonderful.)