I've been moving my main character from my xbox to my modded pc game and back several times. Loading times on the xbox are so long now...got close to finishing the Dawnguard expansion and the game simply stopped working. The auriel's bow quest have you talk to a guy - enemies attack and the roof is supposed to come down on you. I keep reloading and triggering this quest. I've had the roof almost crush me, the last enemy in the pack frozen while the others keep attacking him, the guy on the throne just sits there...whenever I reload I'll have a different experience. I'm going to have to get the expansion on steam and try to continue on the pc.