I have the same problem, but I am currently running Windows 7 and the update will not work for me.
History of problem:
Was running Vista Pro worked fine for 1 yr. Windows updated systems 1-2 weeks ago and ran into the problem of no audio devices installed. Looked online tried many "solutions" and did not find answer (Did not find this site till now). I reformatted my computer and installed Windows 7 Pro and on first boot sound returned and I presumed the problem was fixed. But after putting my computer feel asleep (I went to the store while installing programs again) the problem returned.
In my device manager I have no Game controllers, sound Option when the sound doesnt work. I checked when the sound did work and it was there and I updated the drivers and all. Please help! Thank you much in advance
Edit: I have checked microsoft for all updates available and none are. I even tried to use the vista one :-\ I wanted to check here before contacting microsoft because that would be an all day event