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

Question

I have been trying to figure out how to fix this problem for two days. I'm new to this kind of thing so I would appreciate it if someone could tell me how to fix it.

I've tried deleting skype but that didn't work, I've tried turning off the world wide web thing off, IIS off nothing seems to work.

12:51:22 PM  [Apache]   Problem detected!
12:51:22 PM  [Apache]   Port 80 in use by "Unable to open process" with PID 4!
12:51:22 PM  [Apache]   Apache WILL NOT start without the configured ports free!
12:51:22 PM  [Apache]   You need to uninstall/disable/reconfigure the blocking application
12:51:22 PM  [Apache]   or reconfigure Apache and the Control Panel to listen on a different port

Answer 1

1. Open a CMD prompt as administrator and execute the following command:

   net stop was /y
   

2. Open the Run dialog box (press Win+R), then type: services.msc

   Then search for World Wide Web Publishing Service (WWW-Publishing Service) and Web Deployment Agent Service and stop them. You should also disable them.

3. Start Apache again with XAMPP :)

Link Ref: https://www.sitepoint.com/unblock-port-80-on-windows-run-apache/