Missing 3D Vision Drivers and Stereoscopic 3D option (Vista only)
Support for 3D Vision under Windows Vista is discontinued beginning with the Release 313 drivers. 3D Vision and 3DTV Play functionality will not be available with these drivers. NVIDIA will continue to support basic 3D Vision and 3DTV Play functionality for Windows Vista with Release 310 or earlier drivers. Basic functionality includes full-screen viewing of 3D games, pictures, and movies on 3D Vision monitors, notebooks, and 3D TVs (with 3DTV Play software installed).
You can download Release 310 drivers here: http://www.geforce.com/drivers/beta-legacy