[Random Ping]

This may be affected by a windows microphone feature as well. In one of the updates, Windows added a voice/speech "improvement" that messed mine up. The only way I fixed it was disabling it's connectivity to the rest of my features/menus. Though I don't think this is your same problem, as your mic will actually work sometimes, you might try looking into your sound/speech features in the windows control panel and seeing if you have any problems there.

Also, it may help if you could give us a step-by-step rundown on exact what happens, sometimes it's the little details, that don't appear important, are the cause of the problem.