Although, I do know that the failures during the first reboot are always driver - related. Someone once found a log somewhere (on his system) on an update failure and posted it - I just can't remember where he found it.
EDIT: I think it's in the C:\$WINDOWS.~BT\Sources\Panther\setuperr.log
I need more Coffee...
Where is Murdabenne its been over 30 mins....Gezzzz