I still have the same problem, so I'll try to explain more clearly. I'll
explain what happens in two scenarios.
Scenario 1: Muting the speakers
1. Click the volume icon in the tray
2. Click "Mixer"
3. Click the mute icon below "Speakers" in the "Device" section
4. The window looks like this
http://img473.imageshack.us/my.php?image=problem01rg6.jpg
5. BUT sound continues to play!
Scenario 2: Turning down the speakers
1. Click the volume icon in the tray
2. Click "Mixer"
3. Drag the "Speakers" volume down
4. The window looks like this
http://img357.imageshack.us/my.php?image=problem02qn2.jpg
5. BUT sound levels being played (e.g. from windows media player) remain
unchanged!
6. Notice that the bar for the speakers looks messed up. It has a green bar
going up part-way, and a grey bar continuing ABOVE the slider!
Any advice?