First of all download your helm version.
To serve your chart locally
Normally, your local repository will be here C:\Users\Jeremy\.helm\repository\local on Windows.
You can see that we have a folder call vistio.
To install this chart, simply run :-
helm install local/vistio
Why local? If you type helm repo list , you can see that the "local" refers to a local repository.
Please note :-
helm list repo is not the same as helm repo list , please make sure you type it correctly.