Jeux impossible d'installer COD

Bonjour,
Je me suis acheté COD 4 mais lors du lancement du jeux, voilà se qu'il me dit : [code]
----- Client Initialization Complete -----
Attempting 44 kHz 16 bit [Windows default] sound
----- R_Init -----
Getting Direct3D 9 interface...
Pixel shader version is 0.0
Vertex shader version is 0.0
Video card or driver doesn't accelerate transform and lighting.
Video card or driver doesn't support high-quality polygon offset.
Video card or driver doesn't support the required stencil operations.
Video card or driver doesn't support UBYTE4N vertex data.

Error during initialization:
Video card or driver doesn't support UBYTE4N vertex data.
[/code]
Que faire ?