It is on the servers, but the web page links are goofed up. Have been since the driver was released. You would have thought someone would have noticed all of the comments here and fixed it by now. Anyway, for English (US) desktop, here are the correct links:
Windows 10 64-bit:
Drivers | GeForce
Windows 7, 8, & 8.1 64-bit:
Drivers | GeForce
Windows 10 32-bit:
Drivers | GeForce
Windows 7, 8, & 8.1 32-bit:
Page not found | GeForce
With all of these links, use the "Save As" option in your browser to download the package to your hard drive before attempting to launch the installer.