XAMPP Port 80 in use by “Unable to open process” with PID 4! | How to solve?

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

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

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So I have faced the same problem when trying to start Apache service and I would like to share my solutions with you. Here are some notes about services or programs that may use port 80:

1. Skype: Skype uses port 80/443 by default. You can change this from Tools - Options - Advanced - Connections and disable the checkbox "use port 80 and 443 for addtional incoming connections".

2. IIS: IIS uses port 80 be default so you need to shut it down. You can use the following two commands: net stop w3svc, net stop iisadmin.

3. SQL Server Reporting Service: You need to stop this service because it may take port 80 if IIS is not running. Go to local services and stop it.

4. VMware Workstation: If you are running VMware Workstation, you need to stop the VMware Workstation server - port 443 as well.

These options work great with me and I can start Apache service without errors.

The other option is to change Apache listen port from httpd.conf and set another port number.

Hope this solution helps anyone who faces the same problem again.

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