I've recently done some regular updates and lost sound to my laptop speakers.
The link above loaded a rc driver which still left the problem of the laptop speakers working even with the audio/headphones plugged. I suspect that I've lost my laptop speakers as a partial fix to this problem, unless others have an alternative suggestion.
My sound still works through the audio/headphone jacks; just no onboard speakers. Not a problem for me though, unless on the road.