How can users troubleshoot the error message "Server not found" when trying to access localhost after setting up XAMPP?

To troubleshoot the error message "Server not found" when trying to access localhost after setting up XAMPP, users should check if the Apache server is running in XAMPP control panel, ensure that the correct port (usually port 80) is not being blocked by another application, and verify that the localhost address is correctly configured in the Apache configuration file.

// Check if Apache server is running in XAMPP control panel
// Ensure that port 80 is not being blocked by another application
// Verify that localhost address is correctly configured in Apache configuration file