How to resolve issue with server 2003 Lenovo driver up-gradation?

I have Windows Server 2003 installed on my Lenovo laptop, and was wondering if someone can help me to resolve issue with sound? I recently updated my sound driver, since then I’m having sound problems. Sound stops in the middle of playing sometimes; sometimes I can’t hear anything to begin with. Can anybody help to resolve server 2003 Lenovo driver up-gradation?
