A:Answer Make sure it is selected under the recording tab in the sound menu. If you have a webcam or other device with a mic, it could select the wrong one. I would disable any other mic to be safe.
Now, there is also a chance that the mic is busted. Mine broke after 6 months. It just randomly stopped working. If the mic is selected as your default device and it still isn't working, you might as well contact SteelSeries.