I've attempted to upgrade xampp on my machine but Apache is misbehaving. Everytime I try to change the ports it appears that everything is working but I get a 404 when I try to go to "localhost", when I try rebooting I get the following in Control Panel:
4:25:48 PM [Apache] Problem detected!
4:25:48 PM [Apache] Port 123 in use by "httpd.exe"!
4:25:48 PM [Apache] Apache WILL NOT start without the configured ports free!
4:25:48 PM [Apache] You need to uninstall/disable/reconfigure the blocking application
4:25:48 PM [Apache] or reconfigure Apache to listen on a different port
4:25:48 PM [Apache] Problem detected!
4:25:48 PM [Apache] Port 456 in use by "httpd.exe"!
4:25:48 PM [Apache] Apache WILL NOT start without the configured ports free!
4:25:48 PM [Apache] You need to uninstall/disable/reconfigure the blocking application
4:25:48 PM [Apache] or reconfigure Apache to listen on a different port
Are these bad ports? I'm not sure how to tell which ports are available for use.