Apache is not running from XAMPP Control Panel ( Error: Apache shutdown unexpectedly. This may be due to a blocked port)

Question

I have installed XAMPP (xampp-win32-1.8.2-0-VC9-installer.exe) on Windows 7 successfully. But unfortunately, the following error was found during running Apache from XAMPP C

Answer 1

Even if you've configured Apache to listen on another port, you will still get this error if another program is using the default SSL port 443.

What you also need to edit is the http-ssl.conf file and alter the line Listen 443 and change the port number there.