I downloaded new nForce drivers
and fixed the issue. When shutdown was selected, my computer would go through the shutdown process. However, it would restart at the end right after the screen goes blank at which time it was supposed to shutdown. http://downloads.guru3d.com/nForce-15.45-Vista-|--Windows-7-%2832|64-bit%29-WHQL-download-2356.html
If anyone has a Gigabyte N650sli-ds4 motherboard and has issues, give this a try.