Open Gl

My OS is Win SE. I just replaced a Diamond 32MB 770 Ultra video card with a Nvidia 3D Power Geforce2 GTS Pro DDr 64 MB.
Whenever I try to play any game that requires Open GL I Get a message stating the games needs Open GL accelerator. I cannot find it anywhere on my system. I have downlowded all the newest drivers but nothing works.
I need to know how I can downlowd Open GL itself and install it on my system. Can anyone help me? Thanks.

OpenGL for nvidia is in the driver package and not a separate download. Check your win.ini ,it is a text file, for a line with a DVA string. Remove if found or replace with DVA=1.

Best thing to do after replacing such hardware as your video card is a clean reinstall of your OS.