Hi the best place to get RealTek drivers is usually from their
website. The link below indicates a Vista/Windows 7 driver from
September which seems to be the most recent :
I'd try installing that directly, then reboot as before to ensure you
have an up-to-date driver for the sound card.
What specific problem do you mean by stopped working - you actually
see a message saying "Windows media player has stopped working" ? Or
something else ?
Cheers - Neil
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Digital Media MVP : 2004-2009
http://mvp.support.microsoft.com/mvpfaqs