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After installation, the device will appear under as “Realtek USB GbE Family Controller” or “JP1081B USB LAN v21”.

Press on your keyboard and select Device Manager from the menu. Step 2: Locate the Adapter

: On Windows 10, the OS may attempt to install a generic driver automatically when the device is plugged in.

If you are currently holding one of these dongles and seeing a "Device Unknown" error, you don't need to keep searching for that specific "Driver 21" string. You need to go to the source.