When you type “help” what commands show up?
Are there errors that get output when CommandBox starts up?
It sounds like the installation might have gotten interrupted. Try deleting the .CommandBox folder from your user directory and simply run the executable again.
Oh, it just occurred to me that “coldbox install” is not a command. It’s just “install”. Have you tried that yet?
When you said help was the only command that worked, I assumed you had tried several commands and they all failed. Can you tell us exactly what commands you tried?
running “coldbox help” should tell you what valid commands exist in the coldbox namespace.