I think your issue needs to have it's own thread as this one doesn't sound like a video card issue, but a rather a driver or Windows issue outside the video card.

martinesku said:
i dont install audio driver-because i use another sound card. But i will try to install this drivers too-to eliminate this possibly solution.
And yeah, you do need to install the drivers for the soundcard, which could cause problems if they aren't installed.

Anyway start you own thread in the general section and we'll go from there. Scratch that you're in the right section, you just need to create your own thread.

Thanks.