im having a problem with midievil 2 total war. when i start up the game my screen starts to flicker and once i get into the main screen it flickers even more. other objects on the screen start to jump around also from their origional place. thats not even the worst part. when i enter a battle i get these wierd lines running through the air and there are hundreds of them.

i did just buy a new computer and also a new graphics card e-geforce 7600 gt
and maybe that is part of the problem.
im preatty sure i downloaded the new drivers when i installed the graphics card so i rly dont no what to do now. i have tried messing with the screen resolution and that seems to help a little but i still get the flicker and the lines.

thanks for any help or advice