For some strange reason out of the blue my sound went on my computer. I search every where and could not see why. My son checked it out and fixed it. The reason, Windows 7 needs a default to the sound and when I plugged in the USB hub, something that was attached, took over the default. This has just started happening. After he fixed it and left. I needed to plug in the USB and the soumd went. To fix it I need tp go to Control Panel -- Sound -- FIX . but I can't find FIX. can some one out there help. no only to fix it this time but fix it so I can use my USB hub.