My PC is a Lenovo G50-80 with Windows 8. I bought a keyboard because i did not like the built-in one, and when i press keys that add or decrease sound, it mutes my microphone. I tried to do what other people did with similiar problems but none of them worked. I already tried: Disabling the “Allow applications to take exclusive control of this device” option, stopping processes that seemed suspicious and messing with some settings. If you have a suggestion please let me know.