Confused about linux/windows containers and dockerd service

Dear Users,
I’d like to start docker at windows startup like a service (using Windows 10 + Docker 1.12.1 stable), but without requiring user login. I’d like to use linux containers (linux/amd64)

I could not find a way to start “Docker for Windows.exe” as a service, nor a way to do the same things it does at startup manually.

When I use resources/dockerd.exe --register-service && net start docker

it works but it starts “windows” containers (windows/amd64)

I’d like to use linux containers with dockerd --register-service . How to do that?
Thank you!