Getting this issue when trying to start Apacheon XAMPP?
13:47:10 [Apache] Problem detected!
13:47:10 [Apache] Port 80 in use by "Unable to open process" with PID 4!
13:47:10 [Apache] Apache WILL NOT start without the configured ports free!
13:47:10 [Apache] You need to uninstall/disable/reconfigure the blocking application
13:47:10 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
13:47:10 [Apache] Attempting to start Apache app...
13:47:10 [Apache] Status change detected: running
13:47:11 [Apache] Status change detected: stopped
13:47:11 [Apache] Error: Apache shutdown unexpectedly.
13:47:11 [Apache] This may be due to a blocked port, missing dependencies,
13:47:11 [Apache] improper privileges, a crash, or a shutdown by another method.
13:47:11 [Apache] Press the Logs button to view error logs and check
13:47:11 [Apache] the Windows Event Viewer for more clues
13:47:11 [Apache] If you need more help, copy and post this
13:47:11 [Apache] entire log window on the forums
The reason might be that the port you are using is already in use on your computer, and that you cannot use it for your Apacheweb server.
Error message in XAMPP when starting Apache
Locate your httpd.conf – if you don’t know where it is located, in XAMPP window, click on Config > Apache (httpd.conf), it will open it automatically in your system’s default text editor.
Locate httpd.conf in XAMPP
Look for the line containing Listen 80, 80 is the port used by Apacheto serve web pages
Listen 80, default Apache port
Change it to another value – for example Listen 8080