No connection could be made because the target machine actively refused it. "Kubernetes on Docker for Windows"
There is an issue with docker for windows when the HOMEDRIVE is set my a corporate policy.
If you set the $KUBECONFIG environment variable to C:\Users\my_username\.kube\config (make sure the $HOME environment variables expands, don't use $HOME itself.) It should work.
Further info: https://github.com/docker/for-win/issues/1651
I found that Docker for Windows correctly updated my kubectl config file, but on Windows 10 Enterprise there is no environment variable called "HOME".
So kubectl cant find the config file, C:\users\{userid}\.kube\config
Adding environment variable HOME=C:\users\{userid} solved the issue on my machine.