I don't have any sound on my computer. It worked fine and then just quit all of a sudden. I went through the entire windows trouble shooter trying what they said, and I even downloaded the best driver and installed it and it still won't work. It appears to play, but I don't hear anything. I recieve no error messages, my speakrs are on, and everything is connected right. I don't know what is wrong with it, can anyone help me?