Ok so I play on pc, and the game runs fine up until the battle in Auriels chapel. I can make it through the first time the frozen falmers break out, but after that the game crashes. It's never crashed before, and I run alot of mods, but non of them have ever afected the game before. Does anybody know what could be going on?
Used to happen to me all the time. I'm on PS3 by the way.
My solution:
1) turn off all auto-save functions (it autosaves just before you're about to head out of the chapel to where the waystation is whether you want it to or not and that's where I always froze).
2) make sure your inventory is as low as possible (just your weapons and armor that you're going to need - just unload all your crap in to one of the containers in that hallway before you go outside - sometimes I even go back for it)
3) if all else fails - autosave, just before you head outside then literally turn off your machine and reboot it and load that save.
It's always an issue for me at that point, but, I've found that, if I wait until I'm over level 81 before I go there it runs more smoothly (oddly - since glitches and freezes happen so much more often once your save is above 14mb, but, hey, what can you do).
Let me know if any of that works for you.
Oh! And one other method I've found. Just skip the entire interior all together (don't wake up any falmer, don't loot anything, just run through - you can always come back later for the last paragon crystal). There's something about that interior that just screws everything up. Don't know what it is.