It's installed through Steam, though Steam is not the issue. It's an obvious code fault as it only occurs when targets either become hostile or take damage. The issue also never occurs unless I've loaded a saved game. My guess is it's either not saving or not loading properly. Once I'm able to kill something with a (really) old save file, the game never crashes until I save and try to play on another day.
I've tried contacting the actual support team at bethesda by submitting forms through their site with detailed information, but I haven't gotten so much as one single email response.
Currently running a quadcore intel 2.8 processor, 4 gigs ram, 32bit (ack) Vista, nVidia 8800 GT (steroscopic nvidia 3D ftw). The game is patched to the latest version Steam offers. nVidia drivers are also up to date, though it's not really a graphics issue anyway.
Is there a way to copy your save to another machine? I have a laptop with higher specs running Windows7 and thought I should give it a go. I have F:NV on that machine with no issues so far, but I kind of want to keep my old save without starting all over again.
The only mod made to the system is the DX9 replacement .dll to enhance framerate. On my laptop (the one without issues yet), however, I have a ton of mods... so I don't think it could be mod-related. I can reproduce the issue like clockwork, so I can't imagine it's hardware related; it only ever occurs when a target's hostility state changes from 0 to 1 ... or when any hostile target takes damage. Sometimes, when you mouse-over a friendly target they show red for a second... then move a bit and the HUD corrects itself. I'm guessing it's a fault with saving NPC reputation or something, and it's trying to push a value outside an expected number range with no exception handler. *shrug*