I had the Gigabyte GA-P35-DS3L in a machine I was refitting, but I had lost the original Motherboard drivers CD. I downloaded them from the Gigabyte website.

Everything was fine apart from the Audio Driver that seemed to crash out.

My usual search of the web finally lead me to this forum where the solution was found.

Go to Control Panel and then Add Remove Programs, uninstall anything to do with the Audio Driver, including Microsoft UAA HD Audio Driver. Then run the installation again, this worked for me and seemed to work for a everyone else as well.