Creating machine... Machine is already running (Windows)

[niccokunzmann]

I just witnessed this dialog:

Creating Machine default...
Running pre-create checks...
Creating machine...
Waiting for machine to be running, this may take a few minutes...
Machine is running, waiting for SSH to be available...
Detecting operating system of created instance...
Provisioning created instance...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
To see how to connect Docker to this machine, run: C:\Program Files\Docker Toolbox\docker-machine.exe env default
Starting machine default...
Machine "default" is already running.
Machine "default" is already running.
Looks like something went wrong... Press any key to continue...

docker version

Client:
 Version:      1.9.0-rc2
 API version:  1.21
 Go version:   go1.4.3
 Git commit:   60d36f7
 Built:        Fri Oct 23 00:20:59 UTC 2015
 OS/Arch:      windows/amd64
An error occurred trying to connect: Get http://localhost:2375/v1.21/version: dial tcp 127.0.0.1:2375: ConnectEx tcp: No connection could be made because the target machine actively refused it

docker info

An error occurred trying to connect: Get http://localhost:2375/v1.21/info: dial tcp 127.0.0.1:2375: ConnectEx tcp: No connection could be made because the target machine actively refused it.

How to reproduce the problem: open the quickstart command line.

[aish18]

Try uninstalling and installing the ethernet adapters i.e., Virtual Box-Host only networks used by the default machine and check if the default machine is running and open the quickstart terminal. I encountered the same issue and tried various methods,and this helped me solve. :)

Previously,I had also rebooted my system after using the virtual box repair tool (can be started by double clicking the virtual box install file again),Don't know if that was helpful.