I've the same problem. It's says : " Invalid Hardware Code. Make sure the Serial Number used is valid for the product you are trying to activate, generate a new Hardware Code and try again. "
When I follow step to get back a deactivation key. it generates an error.
I've my game Black shark on steam. I've installed it and i've played it after update. Then i've launch Dcs world and it's impossible to start BC 2. I've proceeded to repair and fix way but without success.