Go to
start > Control Panel > Add and Remove Programs.
Remove anything listed under nVidia.
Then download this and choose SAVE:
http://www.nvidia.com/object/winxp_2k_93.71.html
Save it to the desktop or wherever just remember where you saved it.
Then go to your Device Manager = right click My Computer & then click Manage then Device Manager.
Now click the + next to Display adapters.
Right click your nVidia card and choose Update Driver...
Then choose: Install from a list or Specific location (Advanced)
Then choose: Search for the best drivers in these locations.
Then: Include this location in search.
Then hit Browse and go to your SAVED nVidia download and Enter it.