Hi,

My father has been playing Skyrim for the last couple of months, I'm posting this on his behalf. He has encountered a bug at the quest where you discover Alduin's wall (been a while since I played myself, can't remember the exact name of it, sorry). The two NPCs that are supposed to be walking toward the wall have stopped outside at the first bridge. Apparently this is a well known and documented bug.

I dropped by after work to give him my wireless receiver so he could install updates, but that did not solve the problem. I've tried shouting at them, fast travelling, shooting them, shouting at them, punching them in the face, running at them full speed wearing only a loincloth and a helmet, and casually flirting with Esbern. None of these were successful.

Reverting to a previous save is not an option as he has put in about 20 hours of gameplay since starting the quest (he got bored of trying and went on to do other things). Please advise.