I have a toshiba Satelite running Vista Business. Yesterday while burning a DVD I started getting audio feedback in my onboard speakers. After checking, it appears that my built in Microphone has activated and is feeding audio to my speakers. When I turn up the volume I get feedback. Also the same if I plug in my remote speakers. I have looked in the control panel to find a way to disable the Mic but no luck. I have removed the software I was using to burn the DVD again no change. I have rebooted several times but there is no change. Has anyone had this trouble before or any ideas on what to do.