1. Go into "Start" and in the search box type "Device Manager" and then click on it in the list.
2. Double click to drop down the other details on "Sound, video and game controllers".
3. Single on click to highlight the correct audio device.
4. Right click on the highlighted device and the click "Update driver software".
5. Follow the prompts and you should be good.
(If there is more than one, then you will need to repeat this for the others.)