title: Error checking TLS connection: Error checking and/or regenerating the certs
body: <p>After I restarted my windows i cannot connect to docker machine running in Oracle Virtual Box.
  When i start Docker QuickStart Terminal every thing looks fine, it's coming up OK and it gives me this message:</p>
  
  <pre><code>docker is configured to use the default machine with IP 192.168.99.100
  For help getting started, check out the docs at https://docs.docker.com
  </code></pre>
  
  <p>but when i do:</p>
  
  <pre><code>$ docker-machine ls
  NAME      ACTIVE   DRIVER       STATE     URL   SWARM   DOCKER   ERRORS
  default   -        virtualbox   Timeout
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>λ docker images
  An error occurred trying to connect: Get http://localhost:2375/v1.21/images/json: dial tcp 127.0.0.1:2375: ConnectEx tcp: No connection could be made because the target machine actively refused it.
  </code></pre>
  
  <p>also when i try to reinitialize my env., i get:</p>
  
  <pre><code>λ docker-machine env default
  Error checking TLS connection: Error checking and/or regenerating the certs: There was an error validating certificates for host "192.168.99.100:2376": dial tcp 192.168.99.100:2376: i/o timeout
  You can attempt to regenerate them using 'docker-machine regenerate-certs [name]'.
  Be advised that this will trigger a Docker daemon restart which will stop running containers.
  </code></pre>
  
  <p>BTW, Regenerating certs also not helping.
  Any idea?</p>
  
  <p>Thanks.</p>