Alright so I paid the $20 for Dawnguard. Was rather excited to get back into Skyrim. Loaded up the game, made a whole new character to go with. Got to lvl 15 and decided to start Dawnguard. So I went in. I saw a crossbow and thought it was cool instantly. Only problem, all the walking animations, idles, and killing move animations were missing! That svcks. Maybe I can avoid the crossbow (I later downloaded the behavior files that were supposed to be included with the DLC). So I started the quests. I got into the Cavern where I had to stab my hand. My character got stabbed and then turned into a see-through ghost. Weird. I couldn't use the mouse anymore. I got through moving the braziers because I could sneak, but then Serana's animations didn't load and I couldn't walk. I got really frustrated. I went online and downloaded the proper animation and behavior files, which for a second time, were not included with the DLC download on Steam (or my download screwed up, but I paid $20 for an incomplete version of Dawnguard, svcks). Now I get to Volkihar Keep, ah cool, I wanna be a vampire. I get the info from Serana and shes like "Lets go inside." So I go to click the door. Nothing happens. I look at this "Press "E" to enter." Nothing. I try 500 more times, nothing.

This is rediculous. Did I get a alpha copy of the DLC? Why is my copy not complete and working as intended? Why did it cost $20? If I didn't close the game my keyboard would've been launched across the room. Seriously, this is rediculous.

Aside from that, anyone know how to fix this? For the load order the dawnguard.esm I put under Skyrim.esm. Is there another I should load prior, like update.esm (which I believe is the 1.6 update) or should i get the 1.7 beta? How do I fix this? Bethesda is not replying to any emails I send them which is aggrevating me even more...

Sorry to hear. I have no problems with DG.

Did you verify your game cache in Steam?

Yea i have to agree sounds like your download has messed up Dawnguard has bugs but not like what your describing with files missing

Yea I'll run the verify thing and then try again...

I have missing anims for the crossbows and the Vampire Lord powers don't work at all. I downloaded two days ago, how do I verify ?

Right click on your game in your Steam library, go to properties, then to local files, click 'verify integrity of game cache'.

I haven't had that many problems with DG but I recognize some of the problems OP is having. I've already done a few quests for the vampires but yesterday most of my controls and menus suddenly stopped working yesterday. I can still look around and escape still works, as does wasd, jump, sneak, toggle walk and sprint, but I can't open menus or my map or pull up my weapons nor can I interact with anything (NPCs, doors etc). Dunno what caused, I was walking around and suddenly everything stopped. Really weird.
I also have the bug where I revert back from vampirism after turning into a Vampire Lord and back, so I have to use to console every time to change myself back into a vampire.

I know mods screw up DG and I did have a lot of those, as well as SKSE and ScriptDragon... I'm doing a complete reinstall of the game and play with no mods/third party programs whatsoever, see what happens this time. I am loving Dawnguard so far and I'm gonna finish it one way or another! *triumphant pose*

Thanks, I discovered I was missing 8 files. Reacquiring them now