VerxoN,
Shoot. All I can say is that Microsoft doesn't recommend that you reinstall the driver by adding it. They have a helpful guide here:
https://support.xbox.com/en-US/xbox-on-windows/...
But here's a choice troubleshooting step that you can follow:
Solution 2: Uninstall and reinstall the Teredo adapter
To uninstall the Teredo adapter:
Right-click the Start icon, and then select Command Prompt (Admin).
Run the following command from the Admin command prompt:
netsh interface Teredo set state disable
Right-click the Start icon, and then select Device Manager.
Select View > Show Hidden Devices.
Select Network Adapters.
Identify any adapters that contain "Teredo," such as Teredo Tunneling Pseudo-Interface or Microsoft Teredo Tunneling Adapter. Right-click the adapter name, and then select Uninstall.
Restart your PC.
To re-enable the Teredo adapter:
Right-click the Start icon, and then select Command Prompt (Admin).
Run the following command from the Admin command prompt:
netsh interface Teredo set state type=default
Feel free to look at the other solutions there, as one of these solutions at least worked for me. You can also try going into your network interface's properties and enable IPv6. Good luck.