download the above driver and install the setup application.
After an update I lost audio. I'm not very computer savvy. I tried Windows update with no change.
On the lower right hand side there was a little X next to the speaker and if I put the cursor over it it said no audio drivers installed. I used the link above. The update gave a message that it was updating a graphic driver. There was a whole list of all the drivers installed and it showed three audio. After installing the driver update and restarting the computer I have audio again!