Ok so I know there's been a lot of negative feedback and people angry with Crytek's Crysis 2 on PC, multiplayer issues and whatnot and, I've had an issue of my own but I promise to as civil about it as I can.

Basicaaaally- I was playing the game on the 24th when it came out, loved the single player portion, but I started getting random lag spikes, dropping from my average 40FPS, straight down to 0-1FPS.
After playing it repeatedly, it only seems to be getting worse, and whenever I shoot any NPC, I just get horrific lag spikes. I was bearing with it for a while, but now that I'm about half-way into the game, this is just unbearable.
Issue:
- Framerate just drops to 0-1FPS whenever I shoot an NPC despite being perfectly fine at any other given moment
I've already:
- Updated my graphics card drivers
- Uninstalled and Reinstalled the game
- Made sure it's nothing to do with my specs, Nvidia GTX 460, i5-760 2.8GHz, 4GB of RAM
- Tweaked the graphic and resolution settings
- Turned it off and on again!
And unfortunately, none of these have made any difference!
I really don't want to come across as rude, but it's really getting annoying and game-breaking and I'd like to know if anyone else if having the same issue, and if Crytek have taken note of it? As I stated earlier, I really do love this game but the issue here is really killing the otherwise fantastic experience for me.
Thanks guys!