you don't have your Mix properly installed and/or recognized. a) There is still nothing listed, i.e.Now you shall have listed all devices recognized as Mics. In both cases: right click in the empty area, from context menu make sure that both options are ticked (show disabled, switched off devices - or something like that). Either there is listed something or there's nothing. Go to Start->control pannels->manage audio devices (or sounds.)->recording Either connect your Mic to appropriate jack (don't mismatch with output jack for earphones etc.), or if you have integrated one, go to 2.
Other who had the same issue solve it by doing this: