Minikube not working in Windows 8
As @ivthillo already was pointing out, the issue may occur because you are behind a proxy. In this link they explain solutions to configure minikube when you are behind a proxy: https://github.com/kubernetes/minikube/issues/530#issuecomment-250801735
Try starting minikube like this:
minikube start --docker-env HTTP_PROXY=http://$YOURPROXY:PORT \ --docker-env HTTPS_PROXY=https://$YOURPROXY:PORTThis should configure docker to use your proxy.
Here they also propose other solutions: https://github.com/kubernetes/minikube/issues/530#issuecomment-347718692