help here please

[Yak'All]

hello, i have a real problem here... My L4D2 is crashing AFTER i uploaded my graphic driver, help me please i love the game but i cant play it any more :´(

[Primata]

on the library, try °verify integrity of game cache° on the Properties of the game.

[Yak'All]

already did that, i thought it was from the game, but it is not, i dont know what to do now, already re-install it, but same problem. :´(

[bob]

Roll back your drivers. There's something in control panel.

[76561198133628931]

For some reason I can't upload forum posts, so I will just ask here.

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{Glitch}

As many of you know, left 4 dead 2's menu will switch to be one of the 5 campaigns ingame, along with the music.

Mine however, is always stuck with the dead center music and background.

Anyone know how to fix this?