NOTE: To be moved to the FAQ

1.1. Chocolatey

Open a command prompt with Administrator privileges.
Run minikube delete --purge --all
Run, choco uninstall minikube to remove the minikube package from your system.

1.2. Windows Installer

Open a command prompt with Administrator privileges.
Run minikube delete --purge --all
Open the Run dialog box (Win+R), type in appwiz.cpl and hit Enter key.
In there, find an entry for the Minikube installer, right click on it & click on Uninstall.