Here's what's in my board preferences. https://adafruit.github.io/arduino-board-index/package_adafruit_index.jsonhttp://arduino.esp8266.com/versions/2.4.0/package_esp8266com_index.json
I even disable the Windows 10 driver signature verification app to no avail.
I now get the error"error downloading Arduino.esp8266.com/stable/packages_esp8266com_index.json".
Seems I'm doing more troubleshooting than coding or making.One of the posts suggested Platform io. I have no desire to start learning a new system but getting frustrated.