I have installed the DLC Dawnguard, but after I do not want to play the Dawnguard quest line immediately, and the problem occurred then.

I want to visit Hall of Vigilant in the original version of Skyrim, and yes, I want to visit Keeper Carcette (not only for restoration training, but also to see the original dialogue and the person alive). At the beginning of the DLC, Hall of Vigilant will be ruined and Carcette will be murdered. So I did not activate the DLC.

Then I arrived the Hall, and the building remain intact. However, the door of the building does not work: I come close to the door, but there is not a notice that press E button to enter the building. If I press E button before the door, nothing happens that I do not enter the hall at all.


After that I quited the game, uninstalled the DLC Dawnguard, and then enter the game again. However, the door still does not work at all.

I also tried deleting the whole game and re-installed again. Because I bought Skyrim and Dawnguard in the Steam Store, the Steam re-installed both the original Skyrim and Dawnguard (Orz), thus the problem still happens.

Is there any resolution for this problem? Thanks a lot for any help!