Turtlebeach X12 Headset Making Annoying Buzzing Noise Only When Playing Games

My mate has a headset by Turtlebeach and everytime we play games or even when she plays on her own, there's this really annoying buzzing noise which we can't figure out how to fix. We've tried different methods, physically plugging the USB into a different power source and even doing things in Windows Sound Manager. Any suggestions on how to fix this?

Cheers,
Sam.
 
Solution
Go to control panel > Sound > Recording tab and choose your microphone. Click the properties button and go to the Listen tab. Deselect listen to this device.