Good summary, except the driver replacement does not work for me either. New bootcamp update? - till whine.
3) The potential fix on https://forums.macrumors.com/showthread.php?p=5245320#post5245320 only seems to work for windows xp users and not vista.
4) We have to wait for apple to get off the couch and do something about this (joy).
5) Curse my very good hearing of high frequencies...