start docker tool-box: Unable to find image 'i

Question

I am newbie into docker did the following:

• couldn't install docker engine on my windows 7, but instead:

• installed docker tool-box (engine should be already included)

the terminal from the docker tool-box shows me the sign of the docker and everything should be good but i face problem with the following:

• cant run the simple image "hello-world"

  docker run hello-world

  The Error Message:

  Unable to find image 'hello-world:latest' locally  
  

• after login with username and password it appears error (i think it is connected with the same error)

  docker login

  The Error Message:

      Error response from daemon: Get https://registry-1.docker.io/v2/: 
      dial tcp: look up registry-1.docker.io on 10.0.2.3:53: no such host
  

any idea on how to track the reason of such error messages and find away to resolve and solve such issues?