Hi,
Uninstall the Display Adapter from Device Manager and reinstall it.
a. Click Start.
b. Type Device Manager in Start search and press enter.
c. Right click on Display Adapter and select Uninstall.
d. Restart the computer.
For your reference:
Update a driver for hardware that isn't working properly:**http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly**
Regards,
Afzal TaherMicrosoft Support Engineer