text: upgraded to xp pro from me now i have no sound and it tells me everything is working properly can someone help   completely uninstall your sound card and reinstall it with the latest drivers from the manufacturer.  if you have onboard audio just remove it from the device manager and restart your computer so it redetects it.  otherwise it is possible that your sound card could have gone bad in the process of upgrading.  it would be just a case of bad timing on its part.