I don’t use Apache that often, (not as often as I used to), but when I do I sometime get an error telling me that
(OS 10048)Only one usage of each socket address (protocol/network address/port) is normally permitted. : make_sock: could not bind to address 0.0.0.0:443 no listening sockets available, shutting down Unable to open logs
Now in my case the error was because of skype.exe that was using port 443
But if you need to know who is using it simply open the command line and type
And, somewhere in the list, you will give see something that is using 0.0.0.0:443, but you will not see the name, you will see the pid, (the process id).
BTW: to get the error message, you can get it via the logs or you can open a command line and run the Apache server manually.
httpd.exe -k start