: Windows 10 sometimes blocks microphone access. Go to Settings > Privacy > Microphone and ensure "Allow apps to access your microphone" is turned On. USB Power
If the manual driver selection above does not work, or if you prefer an automated installation, you can use legacy software. While the specific "Polycom Communicator Software" is outdated, the underlying drivers were distributed via Plantronics (sometimes branded as Broadcomm). Polycom Communicator C100s Windows 10 Driver
Windows 10 will search for a driver and should automatically install a generic driver. : Windows 10 sometimes blocks microphone access
Before diving into drivers, it is crucial to understand what the C100s is—and is not. Polycom Communicator C100s Windows 10 Driver