Hi Boomer and a Happy 2012 to you!
Well
do your speakers that are hooked up to your computer, unless you are using a laptop, have an on/off button or switch?
Try turning them off. Do you have the little SOUND icon in your tray on the right hand side bottom of your screen where the time is displayed?
If so, click on that and then select MUTE.
Let me know what your situation is with the operating system and the computer and speakers please?
the best to you,
micro...