Download and run the setup for this:
32bit: http://www.nvidia.co.uk/object/win8-win7-winvista-32bit-306.97-whql-driver-uk.html
64bit:http://www.nvidia.com/object/notebook-win8-win7-winvista-64bit-306.97-whql-driver.html
This is last driver that worked for dx8
Edit: I forgot to include you need to disable auto update in your nvidia control pannel, and turn off auto windows updates: http://windows.microsoft.com/en-gb/windows-vista/turn-automatic-updating-on-or-off