I don't know why you need the driver. Is the sound not working, did you just re-install an OS? Most likely, the sound is integrated on the motherboard and the driver that you need to get sound may also be integrated in another file to download.
I can get you to all the drivers. If you update the drivers or apply the patches, you may then have sound. But like I said, I don't know what the problem is that you are having. You can find all the drivers
here.
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