Had the same hardware error - "Code #10 Could not start device" with the standard windows audio driver
Windows 7 wouldn't start the install app package that I downloaded from the Gigabyte support site (XP/2000 application).
I did manage to fix the problem though.
Firstly I uninstalled the audio device in Device Manager, re-scanned for hardware changes, opened the properties of the newly detected audio device, and simply scanned the folder of the CMdeia drivers
and it picked it up and installed fine.