I have Windows 7 and I'm using the Nvidia on-board sound chip. It sets the volume to something much too loud, when I disconnect the speakers. Anyone know how to fix this?
Windows 7 remembers and resets volumes based on the listening device plugged in (say speakers vs. headphones).
Have you tried adjusting the volume with the speakers unplugged? Hopefully it will remember the chosen levels for both unplugged and plugged-in states.