XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12


  1. Open a CMD prompt and type in command: net stop was /y
  2. Run Dialog Box (press keys Win+R) .. then type: services.msc
I then scrolled down to: World Wide Web Publishing Service Double clicked on it and clicked STOP 
(if this service status is Started)
3.Start Apache again with XAMPP :)
Link Ref: