Sup Dudes. I need some help, I got the Mafia 2 DEMO from a magazine on a disc and I installed it. After the installation it does a 1,048 MB update, as if I am downloading the demo again. But iI have installed it already and now i'ts doing this huge update??? WHY??? It does it with all the demos I get on discs that work with steam. Pease someone help me.