This will help if you installed a wrong driver Realtek, OSSupport:Win NT/2K/XP Size:17 AC97, 6 MB It is highly recommended to always use the most recent driver version available Realtek, Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games AC97, Problems can arise when your hardware device is too old or not supported any longer Realtek, Try to set a system restore point before installing a device driver AC97,