IIS-Hardening-1-Disable-insecure-Ciphers-and-Hashes
I believe that a reboot is required for the configuration to take effect. A reboot is required. May not be required for Windows 2003 / IIS6? Might get away with a “iisreset /restart”
Useful links to check before and after applying the registry script.
http://www.serversniff.net/sslcheck.php