I read some of the other posts here, but i haven't been able to find a solution. I have a white "X" in a red circle on my speaker symbol and when I move my arrow over it it says "No audio output device installed". I am running windows 7 Pro just in case that matters. When I go to the sound in the control panel, it says No audio devices are installed. I know when I go into the device manager there should be a sound , video & game controllers but there is none. I also went into msinfo32 under components and when I go under sound device, there is nothing. Any Suggestions???