I´m on the last levels of Marvel Ultimate alliance, but every single time I reach this point where I´m about to face the dark versions of Thor and Spider-man the game wont move anymore, it does not crash, but it becomes unresponsive, I´m unable to pause neither with the keyboard nor the game-pad. A sad thing, the same thing happened to me when i was playing X-Men Legends 2, some bug prevented me from finishing the game.