How do I fix authentication errors on my internet connection?

1. Check Network Settings – Check your network settings on your router and modem to make sure everything is configured correctly and has not been changed.
2. Verify Your Credentials – If authentication is required, verify that your credentials are correct and that they are up-to-date.
3. Try A Different Computer – See whether the problem exists across multiple computers. If the issue appears only on one computer, it could be a problem with the computer’s configuration.
4. Verify Firewall Settings – Validate that the firewall settings are not conflicting with your network connection.
5. Restart Your Network Hardware – Restart the router and/or modem. This will reset the connection and re-establish the communication between your device, modem, and router.
6. Check with Your Internet Service Provider – Contact your ISP to make sure they are not experiencing any problems.