Probleme sur call of duty moderne warfare2

Bonjour, j'ai un gros problémes j ai acheté COD MW2 ce matin je l'est installé (avec steam).... tous c'est bien passé ,j'usqu au moment ou je lance le jeux en mode solo le message m'affiche:

-----CLIENT initialization complete------

Attempting 44 kHz 16 bit [windows defaults] sound
-----R_Init-----
Getting Direct3D 3 interface...
pixel shader version is 2.0
Vertex shader version is 0.0
video card or driver doesn't accelerate transform and lightling
video card or driver doestn't support UBYTE4n vertex data.


Erro during initialization:
video card or driver doesnt support UBYTE4N vertex.data

quands je lance en mode multijoueur le messagae affiche:


execing ragdoll.cfg from fastfile
----Client initialization----
----Client initialization Complete----
Attempting 44 khz 16 bit [windows default] sound
----R_Init----
Getting Direct3D 9 interface...
pixel shader version is 2.0
vertex shader version is 0.0
video card or driver doesn't accelerate transform and lighting.
huffman took 3 Milliseconds


Errir during initialization:
video card or driver doesn't support UBYTE4N vertex data.



svp aider moi le jeux coute cher et je n'y connait rien en pc je connait meme pas la configuration
merci d'avance !