Put the disc in the disc tray.
I will have to take my Battlefield 3 disc out of the tray first, though.
There are an amazing assortment of games coming out in 2011.  I am purchasing four of them.  But, urrrggghhh!  Two are being released *one week apart* in May (Brink and Dirt3).  Then two are being released *one week apart* in November (BF3 and Skyrim).  I mean, really?!?!?!