To effectively troubleshoot the “Error: Network connection failed” message, follow these steps:

1. Check Your Modem and Router: Ensure that both devices are powered on. Look for any warning lights, such as a red light indicating a problem.
2. Restart Devices: Power cycle your modem and router by unplugging them for 30 seconds, then plugging them back in.
3. Check Cables: Inspect all cables connected to your router and modem. Ensure they are securely plugged in and not damaged.
4. Connect via Ethernet: If using Wi-Fi, try connecting your device directly to the router with an Ethernet cable. This helps determine if the issue is Wi-Fi related.
5. Run Network Troubleshooter: On your device, access the network troubleshooter tool. For Windows, go to Settings > Network & Internet > Status > Network troubleshooter.
6. Update Network Drivers: Ensure your network drivers are up-to-date. Check the manufacturer’s website for the latest versions.
7. Reset Network Settings: As a last resort, reset your network settings. For Windows, go to Settings > Network & Internet > Status > Network reset. For mobile devices, find the reset option in the settings under General Management or System.

These steps provide a structured approach to identifying and resolving your network connection issues.