I'll have to deploy virtual machines on demo laptops, which will use Vmware player, but I've got some security concerns, as some data stored in the virtual machines are a bit sensitive.

Is there a way to prevent the copy of these virtual machines ? Are the virtual hard drives encrypted, and if not is there a way to encrypt them ? In short, is there a way to lock down everything so that nobody could copy and or use these VMs in another computer ?