{FIX} Teredo Tunneling is installed but missing in Device Manager or gives error code 10 after restart.

If you have installed the Microsoft Teredo Tunneling Adapter and after the restart, the teredo tunneling adapter is missing as an installed device in device manager, or if it isn't working (The device cannot start – Code 10), then Teredo tunneling is probably misconfigured on your computer. To fix these issues in Teredo tunneling adapter (or in Teredo tunneling pseudo interface) follow the steps below.

How to fix Teredo Tunneling missing problem or Teredo Tunneling Pseudo-Interface error Code 10.

Step 1: Enable Teredo client.

1. Go to Start > All Programs > Accessories.

2. Right click at Command Prompt and select Run as Administrator

3. At command prompt window, type the following commands in this order and press Enter after you type each one of them.

• netsh
• int teredo
• set state disabled
• int ipv6
• set teredo client
• 

4. Close the command prompt window.

Step 2: Uninstall Teredo Tunneling Pseudo-Interface.

5. Open Device Manager. To do that:

1. Press “Windows”    + “R” keys to load the Run dialog box.
2. Type “devmgmt.msc” and press Enter.

6. At device manager, from the View menu choose Show hidden devices.

7. Under Network Adapters you should see now a new device called Teredo Tunneling Pseudo-Interface. Right-click on it and select Uninstall.

8. Without closing the device manager continue to install Teredo Tunneling.

Step 3: Re-install Microsoft Teredo Tunneling Adapter

1. Re-install Microsoft Teredo Tunneling Adapter by using the steps in this guide: How to install Microsoft Teredo Tunneling Adapter

2. Restart your computer.

Note: If Teredo Tunneling device still doesn't start (Code 10), then follow the steps in this guide Teredo Tunneling device cannot start – Code 10 to fix the error.

You 're done!