I have a white Macbook bought in July 2009 with Windows XP installed with BootCamp. A few days ago, the Apple Software Updater downloaded an update for BootCamp which apparently included updated audio drivers. Unfortunately, there is now no audio coming out of the speakers or earphones whether the sound is muted or not (in either Realtek or Windows sound managers). The sound works fine in OS X. Is anyone else having this problem since the update or is there something obvious which I'm missing? Thanks!