World in Conflict question, some help please

I just gave my friend the multiplayer trial thing that came with WIC, and we were gonna play. I started up wic and it asked me for my cd key which is on the box, which I threw it out the other day when I cleaned my room for my new bed. I know some games store the cd key information somewhere within the files, and I can't remember if the game asked me for it when I first installed it, so my question is does anyone know if theres a folder where it could have stored my cd key info? I want to try the games multiplayer since thats where it shines from what i've heard but I threw out the box. Note i'm not asking for a cd key or anything, just asking if the game stored my cd key in a file somewhere.World in Conflict question, some help please
The game doesn't ask you for one until you try to go online, so chance are you never entered it, sorry.