Sound works great in Leopard. However, it just stopped working seemingly out of the blue in Windows XP. I'm using Bootcamp. I notice that the apple keyboard speaker buttons stopped working a couple weeks ago or so, but the sound still worked fine (just had to adjust volume using Control Panel). Well, now there's no sound at all. Not out of my iMac's in-built speakers nor out of the headphone jack. What could be the explanation for this? Why would my Apple stuff like the display brightness adjuster in the taskbar have gone away anyway?