The whole Adventure Shop uses a protection system that is Starforce
but it isn't the same that's used on physical CDs. It doesn't install any drivers on your computer though, which I think was one of the biggest complaints of that protection software. It's more of a digital rights management deal.
http://www.star-force.com/solutions/...proactive/#tab
Hopefully that will help and someone will pop in to correct me if I'm wrong.