I\'m just getting started with docker. I\'m following the instructions specified here https://docs.docker.com/windows/step_one/
I installed docker (1.10.2) on window
Probably it can happen if you were logged in before, by console or by kitematic.
You can try docker logout if you want use docker without auth.
docker logout
In this case Authentication is required: shouldn't appear again.
Authentication is required: