Follow this guide to address “Port 80 in use by "Unable to open process" with PID 4!”
- Click on the Windows Icon.
- Type in Services.
- Click on it when it appears in the search menu. It will now open Services.
- Scroll down until you find “World Wide Web Publishing Service” and select it.
- Now, go to the menu bar at the top and click ACTION→ PROPERTIES.
- A dialogue box will appear. Click the “Stop” button and set the “Startup type:” to “Disabled”. Once done, click OK.
- Now, try starting up Apache on XAMPP. It should now work. If you run into any problems, contact support!
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