I have the same problem.
I downloaded & did an Install of that File name: sp33867.exe [1/1, 54.26M]
It did not help the Wizard can't find: hdaudbus.sys
Manually I gave the Wizard the location: C:\SWSetup\SP33867/disk1
The Wizard had this location for the cab: C:\WINDOWS\Driver Cache
I'm ready to do a clean install of my OS to get rid of the message for a: UAA Bus Driver for the HD Audio needed.
Please give me a step by step how to do this install. I tried everything I know which is very little.
Note: I have Windows XP Pro service pack3