click start control panel administration tools computer management device manager scroll to sound video and game controllers you might see a yellow question / exclamation? ! mark or a red X Right click to reinstall drivers
or you might download slimdrivers
http://download.cnet.com/slimdrivers-free/3000-18513_4-75279940.html
note: it will find all of your outdated drivers
this is a free driver solutions
they will automatically search for and find the correct driver
hope it helps you
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