When I first installed Ghosts it worked perfectly and I was playing the game just fine, however now when I try to start the game, it shows the very first loading screen of the ghost face and doesn't go any further than that. If I try to open the game while not signed in to my account, it goes past that screen to where it asks me to press the menu button to continue, but then when it asks me to sign in to my account, it freezes on "Reading Save Device". I'm assuming this problem is linked to my account as opposed to the disc as it doesn't let me sign in on the game. If anyone else is having this problem or if anyone knows how to fix it, it would be great, thanks! I've tried reinstalling the game several times and it does not work.