XP
http://www.nvidia.com/object/winxp_169.21.html

XP64
http://www.nvidia.com/object/winxp64_169.21.html

Vista32
http://www.nvidia.com/object/winvista_x86_169.21.html

Vista64
http://www.nvidia.com/object/winvista_x64_169.21.html