For future, please try to post text instead of pic in your question. Second thing is that you are using quite old versions.

Usually errors like:

status error: host: state: machine does not exist minikube windows
The "minikube" host does not exist

are shown where you have some "leftovers" from previous minikube cluster.

It's hard to determine root cause exactly as it would need exact steps you have performed.

1. Delete previous minikube and start again

You have to use command like:

minikube delete

if you specified name of cluster using

minikube delete -p <your-cluster-name>

After that you should start minikube again.

minikube start --vm-driver=<depends-on-your-needs>

Here you have all drivers you can use with minikube.

2. Use --force flag.

It would look like:

minikube start --vm-driver=hyperv --force

but it's also recommended to user minikube delete before this command.

3. Steps to run Minikube on Windows.

As you mentioned you already have docker, but if you would need to reinstall, you can find good tutorial on Docker official docs.

Good tutorial, how run Minikube on Windows 10 can be found here.

You can also check this StackOverflow thread for more updated version.

4. Further issues with starting minikube

If you will still have issues with running minikube, please update your question with debug logs. It can be found here.

minikube start --vm-driver=hyberv --v=7

or

minikube logs