Hi All, I am having trouble with both sound input and output in windows 8.1. Error message is " The Audio Service is not running". I eventually find out the system believes there are neither audio input nor output devices installed. Still, when I go to device manager, the audio system is clearly listed there, the microphone, speakers and mixers are functioning correctly, so is the audio controller , all according to device manager . I checked that the drivers are updated, but still no sound. I have gone over a few You Tube videos with no success. Any ideas? Thanks.