Halp. Just installed Windows 7 on my HP dv5220us notebook. Works great, nice and stable, fast... but no sound. There is even no speaker icon in the tray/taskbar. I open up Device Manager and get this message: No iTunes/WMP/VLC/nada. Sound functions fine in XP and Ubuntu, so I don't think anything physically broke. I tried running the troubleshooter, it tried reinstalling drivers and that didn't help. Other than that I am really liking Windows 7. Any advice? Google is coming up with very little.