ESP_Sprite - yep that was it. I have a bunch of USB Micro B cables and thought the non-data ones were all marked, but no - the first two I tried didn't work, but the third worked. Thanks for the suggestion!

I purchased an ESP8266-DEVKITC-02U-F from Digi-Key but haven't been able to communicate with it using a Windows 10 PC. When I plug in a USB cable, the module Red LED lights up but no COM port device is created. I have read and downloaded many Espressif documents and read the FAQ, but nothing refers ...