Qosmio G40-127 - Graphic Card freezez and turn of the screen

Hi there.
I have a Toshiba Qosmio G40-127 and I have an problem with the graphic card, it freezez and turn of the screen for 1-2 seconds sometimes when I play World of warcraft,
why is it like this and is there any updates for my graphic driver?

If you use Google you can find many links to different forums about WOW and Vista. Obviously you are not alone with this problem. I recommend you to visit http://forums.worldofwarcraft.com/index.html?sid=1

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