cod5 help

hey can somebody help me i buyed the game today and i installed it:D.
But when i start it up i geth a black screen i hear everything but i can't see a thing idk what to do on Activision they seay it has to with audio.
So now am installing all patches 1.1 to 1.4 i hope it works and if not i have no idea

Click on the vista start orb and in the search bar type sound and click on the sound programme.

Click the audio device in use and then click Properties. Go to the Advanced tab and lower the format. I set mine to 24 bit 44100 Hz (Studio Quality). Then click Apply then OK then click OK on the open window.

That should allow you to play the game but if not then keep lowering the quality level of the sound till it does.

Oh and its not as good as COD4 lol.