User blog comment:Zippertrain85/Vampires are NOT undead in TES/@comment-6336669-20140729040611/@comment-6336669-20140729042226

Yea, like a Ghost is a prime example of a spirit being trapped, although they have no corporeal form whatsoever, they're entirely spirit made manifest. Which is why in the older games, they could only be damaged by "fantasy cliche" weapons, like silver swords or whatever, magic, or '''Daedric weapons. '''Specifically the Daedric weapons would work due to them being vulnerable to what their new world is in the realms of Oblivion. It doesn't make much sense if they went to Sovngarde or wherever else, but I guess that's why they made it so they're weak to anything in Skyrim. Magic because magic and silver because...well who knows. It says it works well against undead, but the Silver Hand use them in Skyrim, and are Werewolves considered undead now too? Or is it just because their souls are already claimed by Hircine?