Now this is rather recent, but it appears I cannot kill with the killmove screens with melee weapons. I can still kill with magic and bows. Pretty much what happens is that whenever the kill or death move camera operates I'll hear (not see) a stab motion, but the opponent is still alive and you can do this again and again and again and it really raises up your single or two-handed skill quite proficiently, but you cannot kill the target and it doesn't matter what the target is... be it bandits, common people, guards, vampires, or regular monsters such as bears, spiders, or mud crabs. I thought it might have to do with the mods I had installed, so I uninstalled them, same problem. I reinstalled the same game, same problems. So I don't know what's up. I do know I did install quite a lot of mods at one particular point of time and I didn't notice this problem until I installed certain multi-follower mods (those that go over a hundred followers) and uninstall certain idle mods, in particular the ones that make your characters dance via a spell. Additionally: It appears I also have a problem with the NPC AI, I've seen this in particular at Helgen in which the imperial temporary follower you pick up from the near start of the game just run into a door and when you open the door, he'll bypass the first set of Stormcloaks you see and into the wall in the next room, the one that proceeds to a stairway. I've tried hitting him, blasting him with some flames, does nothing. I'm not sure if it is relevant, but it has been bugging me quite a lot. He still seems to accompany you after you leave Helgen.