No sound in my main speakers

I delete the drivers of my multimedia audio controller I to try to fix it but there's no sounds but i try to download the Realtek AC'97 and I when to the device manager i saw a yellow exclamation point I try to uninstall but it's the same I have so much to download I don't know how to do already it's more than 1 week that I fix it but still is not working my os is windows xp professional 2003 service pack 3 (build 2600)
 
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