There is definitely some sort of mix up with volume set-up. 1) When the 'speaker' icon has lines radiating from it, the cusor highlights the word 'mute'. At the same time; if I check by following the toolbar route of:- play - volume - up/down/mute, I find that none of the last three has a tick against it. 2)If I click aginst the word 'mute', (or press F8), the radiating lines disappear from the 'speaker' icon and the cursor highlights the word 'sound'; and at the same time the word 'mute' on the toolbar has a tick against it. 3) the function keys F9 and F10 operate the volume contol up and down, as they should.