I use Windows 8.1 for Docker.
After installation when I tried to run docker, for example docker run hello-world from cmd I received the following error:
C:\Program Files\Docker Toolbox\docker.exe: An error occurred trying to connect: Post http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.23/containers/create: open //./pipe/docker_engine: The system cannot find the file specified..
See 'C:\Program Files\Docker Toolbox\docker.exe run --help'.