Okay, no clue how to fix this
Installed this mod http://www.nexusmods.com/skyrim/mods/23890/?
i didn't like it, i removed it.. and now i can't kill a vampire.. none of the vampires of skyrim are kill able
i go on commands in skyrim type kill/stop combat nothing is helping me.. now vampires are unstoppable !
keep in mind, i removed mod and this is still on going..