Hi there,
I had quite the same problem and found the solution : you have to uninstall your device, then go to Control Panel => Device Manager => seek for the "!!" symbol on your list, then right click, "properties", and "details", you will see a short list with weird names (ex : HDAUDIO\FUNC_01&VEN_10EC&DEV_0662&SUBSYS_18497662)
Copy it, and go to <Removed> Paste it in the search bar, and select your "Windows" (for me it was Win 10 64bits), download the pilot and install it. Done ! :-)
Problem solved ^^ not thanks to Microsoft or Logitech, unable to understand that problem, caused by the last update of Windows10... (-_-(