FastCGI is not a standard part of IIS 6 - you have to install it
separately. For more info and the download, go to
-L<http://www.iis.net/extensions/FastCGI>. Choose the appropriate version
+L<https://www.iis.net/downloads/microsoft/fastcgi-for-iis>. Choose the appropriate version
(32-bit/64-bit); installation is quite simple (in fact no questions, no
options).