I am new to this game I have game of the year edition. i had no problem loading the first disk one the second one does not respond.I have vista os i even ran auto play still no response.i went back to the place where i purchase it got another copy. same thing i can image to bad disk what could i be going wrong.i even downloaded latest patch.

Welcome to the forums.
You have to go back the first disc and play until it says each individual DLC has been added.

Oh and you posted in the wrong section. But don't worry, a moderator will just move it.