Cara memperbaiki Error: Apache shutdown unexpectedly. di XAMPP

Saya mau memberi tahu kamu cara memperbaiki error pada XAMPP yang di restar tidak ingin jalan dan ada muncul seperti ini :

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Error: Apache shutdown unexpectedly.
22:04:59  [Apache] This may be due to a blocked port, missing dependencies, 
22:04:59  [Apache] improper privileges, a crash, or a shutdown by another method.
22:04:59  [Apache] Press the Logs button to view error logs and check
22:04:59  [Apache] the Windows Event Viewer for more clues
22:04:59  [Apache] If you need more help, copy and post this
22:04:59  [Apache] entire log window on the forums
22:09:00  [Apache] Problem detected!
22:09:00  [Apache] Port 80 in use by "Unable to open process" with PID 4!
22:09:00  [Apache] Apache WILL NOT start without the configured ports free!
22:09:00  [Apache] You need to uninstall/disable/reconfigure the blocking application
22:09:00  [Apache] or reconfigure Apache and the Control Panel to listen on a different port

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