Probleem Opstarten Apache XAMPP

Ik heb XAMPP geinstalleerd maar dit start niet op. Krijg onderstaande melding:

20:20:53 [main] Initializing Control Panel
20:20:53 [main] Windows Version: Pro 64-bit
20:20:53 [main] XAMPP Version: 5.6.24
20:20:53 [main] Control Panel Version: 3.2.2 [ Compiled: Nov 12th 2015 ]
20:20:53 [main] You are not running with administrator rights! This will work for
20:20:53 [main] most application stuff but whenever you do something with services
20:20:53 [main] there will be a security dialogue or things will break! So think
20:20:53 [main] about running this application with administrator rights!
20:20:53 [main] XAMPP Installation Directory: "c:\xampp\"
20:20:53 [main] Checking for prerequisites
20:20:55 [main] All prerequisites found
20:20:55 [main] Initializing Modules
20:20:55 [Apache] Problem detected!
20:20:55 [Apache] Port 80 in use by "Unable to open process" with PID 4!
20:20:55 [Apache] Apache WILL NOT start without the configured ports free!
20:20:55 [Apache] You need to uninstall/disable/reconfigure the blocking application
20:20:55 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
20:20:55 [main] The FileZilla module is disabled
20:20:55 [main] The Mercury module is disabled
20:20:55 [main] Starting Check-Timer
20:20:55 [main] Control Panel Ready

Nu heb ik al gekeken welk programma er op poort 80 zit. Dit is echter een systeem programma volgens mij nl: NL Kernel en System. Ik kan dit ook niet beëindigen.
Wie kan mij helpen dit probleem op te lossen.

Probleem Opstarten Apache XAMPP