Hey, I'm having problems with this update too, everytime I choose to update it does about 5% and then comes up with a message reading:
"Can't process the update. If the problem persists, go to www.xbox.com/support.
Status Code: 3F45-3F4A-A080-1200-D000-0034"
A google search of this code gave me no results.. Anyone able to help?