You can also just change the port the Apache Web Server is using in the httpd.conf file.
In a Windows OS command prompt I use;
netstat -an
to see what services are already running, and what ports they are using, then just pick a port number that's not being used. Much simpler. That's for my Dev environment. On an actual server or in the cloud, I would run the Apache Web Server without conflicts and just shutdown anything else that happens to be using port 80.
