Please help! Evil graphics glitches!

Howdy all Im brand new to the Guild its great to see so many other MWII enthusiasts around! Anyways I was hoping somebody could help me out with a problem that has cropped up in my game during the campaign. When playing the campaign odd lines seem to extend from characters and areas of the map. I went searching for help and found someone with a very similar problem here: http://www.twcenter.net/forums/showthread.php?t=68276 My graphics card is an nVidia GeForce 7900 GS with the latest drivers. I've already rolled back th drivers but that didnt work. This problem literally just happened one day while playing the game (after years of playing it) and has not gone away! Any advice??