driver installation cd s not working vista

Hey just a thought. I did a clean boot for Windows Vista and now i have no sound. I have a Gigabyte Motherboard and have updated the drivers in device manager to the updated versions. yet although my computer is saying there should be sound, there is in fact not.
just wondering if Vista should be released with a bug fix that allows uses to use driver cd's that they got for XP to install their hardware.
Thankyou
Concerned Vista Tester
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