1. Open a CMD prompt as an administrator and execute the following command:
``` net stop was /y ```
2. Open the Run dialogue box (press <kbd>Win</kbd>+<kbd>R</kbd>), 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

1. Open a CMD prompt as administrator and execute the following command:
net stop was /y
2. Open the Run dialog box (press <kbd>Win</kbd>+<kbd>R</kbd>), 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/