Executing docker version returns the following results.
C:\\Projects> docker version
Client:
Version: 1.13.0-dev
API version: 1.25
G
1st start Powershell "as Administrator" that will also prevent the error you got from docker version.
The try to start the docker service: start-service docker
If that fails delete the docker.pid file you will find with cd $env:programfiles\docker; rm docker.pid
Finally you should change HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Containers\VSmbDisableOplocks to 0 or delete the value.