c2d e6850 3ghz 4gb ram 8800gt 550w corsair PSU windows 7 ultimate (legit copy) So a few days ago I was playing a game and WHAM the screen froze, my sound glitched out and then i got BSOD that said nvlddmkm.sys was not responding, then it did a memory dump and i restarted and everything seemed fine until i played the game again and a few minutes in, same thing. I tried this with several games and the same thing. Then after determining i needed to uninstall/reinstall nvidia drivers, it gave me the same blue screen just after the windows boot screen came up. Now i have no graphics drivers (except those that install automatically with windows 7) which is the only way i can get into windows without using safe mode. and i have these vertical lines on my screen you can see in this picture http://www.aww-kittah-aww.com/up/public/136558/1.jpg every time i reinstall ANY nvidia drivers i get a BSOD after the windows boot screen.