Docker for Windows stuck at "Kubernetes is Starting" after updating to version 2.1.1.0 Edge (or Stable)

After hours of trying out different things, here is what finally helped me:

1. Restore Docker to Factory Default settings and Quit Docker for Desktop
2. Delete the folder C:\ProgramData\DockerDesktop\pki (Make a backup of it just in case)
3. Delete the folder ~\.kube\ (Again make a backup to be safe)
4. Start Docker again, open Docker settings, make the necessary configuration changes (adding proxy, setting resource limits, etc..), Enable Kubernetes and let it start
5. Wait a while and both Docker and Kubernetes will be up now.

When you try to connect to Kubernetes using kubectl, you might face another issue like

Unable to connect to the server: x509: certificate signed by unknown authority

You can solve this by

1. Open ~.kube\config in a text editor
2. Replace https://kubernetes.docker.internal:6443 to https://localhost:6443
3. Try connecting again.

Or if you are behind a (corporate) proxy: add kubernetes.docker.internal to NO_PROXY (eg export NO_PROXY=kubernetes.docker.internal), given that the proxy is configured correctly.

If this still doesn't resolve your issue, go through the logs at C:\ProgramData\DockerDesktop\log\ to debug the issue further

I recommend you to check your etc/hosts file to have following lines.

127.0.0.1       docker-for-desktop127.0.0.1       kubernetes.docker.internal

Because docker is failing to resolve your localhost and it get stucks on that state.

And Are you behind some corporate proxy? If so try to switch your proxy or try to bypass it the first time you start the K8. I had the same problem and This solved my issue actually not the upgrading or downgrading.

Irshad's solution worked for me. In my case, pki dir was in
C:\Users\<user_name>\AppData\Local\Docker