Yeah, even though the machine said the update was successful, I noticed the it didn't work after I sent the zip file. That was the only thing that had changed since my initial installation of Poker Night - the failed attempt to update and the auto-revert back to SP1. I'm guessing that the driver issues you're seeing were due to Vista installing what it thinks I should be running.
In any case, your troubleshooting was right on the money. I found the proper audio driver, installed it and...
POKER NIGHT IS WORKING AGAIN! (YAY!)
(also both HP and MS have received nasty hate mail for jerking me around for 3 days).
Thanks a bunch for everything,
Last edited by Ranger Aja; 12/01/2010 at 02:19 pm.
Reason: fixed typos