I don't know why, but for some reason my level 25 stealther has constant bugs and crashes. Hes my favorite character so I don't want to start over... (not to mention how long it would take to redo guild quests...)
My lvl 47 has no problems at all. Every quest works, and never a crash.
For my lvl 25, the dragonstone didn't spawn in Bleak falls, the guy from the museum doesn't walk to the shrine after I collected the pieces, Erandur doesn't go inside his tower, and now everytime I go to Rannveig's Fast the game crashes, but only for this character.

Any clue as to why the game is bugging on him specifically?