Resolving the “Error: Network connection failed” message requires systematic troubleshooting. Follow these steps to diagnose and fix the issue:

1. Check Physical Connections: Ensure all cables are securely connected to your modem and router.
2. Restart Your Device: Power off your computer or device, wait a few moments, and turn it back on.
3. Power Cycle Your Modem/Router: Unplug your modem and router, wait for 30 seconds, and then plug them back in. Allow them to reboot fully.
4. Check for Service Outages: Visit your ISP’s website (if possible) or call their customer service to see if there are ongoing outages in your area.
5. Forget and Reconnect to Wi-Fi Network: On your device, forget the Wi-Fi network and reconnect by entering the password again.
6. Run the Network Troubleshooter: If you’re using Windows, run the built-in network troubleshooter by navigating to Settings > Network & Internet > Status > Network Troubleshooter.
7. Update Network Drivers: Ensure your network drivers are up to date. This can typically be done through your device manager.
8. Reset Network Settings: If problems persist, consider resetting your network settings. This will remove all saved networks and passwords, so use it as a last resort.
9. Check Firewall Settings: Ensure your firewall is not blocking your connection. Temporarily disable it to test if it resolves the issue.
10. Contact Your ISP: If you still cannot connect, reach out to your ISP for further assistance. They can run diagnostics on their end.

Following these steps can resolve most connectivity issues. However, if the problem persists, it may indicate a more significant issue that requires professional assistance.