» Thu Nov 15, 2012 2:02 pm
You haven't mentioned whether or not you're using mods...if you are, disable all of them and completely uninstall them. This includes removing any loose files floating around in \Data, especially in the Scripts folder. Once you're sure you've scorched and salted the earth so to speak, relaunch Skyrim and see if your Death Hounds and Vampires have names then. If they do and you're interested in still playing with mods / tracking down whichever mod caused the problem, you can start adding mods back into the game one by one until you figure out which one's the culprit.
If you're not using mods, have you tried validating the game cache through Steam? It's a long shot but still worth a try.