This is really an odd issue. When I close the laptop (I use it on a docking station; it doesn't leave the docking station when this issue occurs) or when I open iTunes, the volume output on the machine drops.
Not the Windows volume bar itself. That stays the same. But the volume output by a program (like Winamp, but its happened with games too, so it's not app specific) drops. Not the volume control on those apps, but the output volume drops.
A quick restart of the quiet app fixes the issue. But it happens every time I close the laptop or open iTunes.
This is very odd, and I'm stumped. Any ideas?