We recently got some of these HP laptops in to be deployed out to some of our users. However I've got this one device that I can't seem to find a driver for. All it says in device manager is "Audio Device on High Definition Audio Bus". I've already installed all the audio, webcam (thinking maybe it was a mic), modem, and various other drivers I could think of but still no go. This is also causing the laptop to not shut down correctly when I try to power it off. Has anyone else deployed one of these with XP on it and had any better luck?