If your video driver won't support setting the Refresh Frequency, use Regedt32 to navigate to:
Continue to navigate to <YourVideoDriverType>\Device0.
Double-click or Add Value name DefaultSettings.VRefresh, a type REG_DWORD, and set the data value to a Refresh Frequency (that can be supported), in hexadecimal.
Here are some common Refresh Frequencies:
You must shutdown and restart Windows NT.