They often say that we don’t know what we have until it’s gone. Your missing Microsoft Teredo Tunneling adapter literally serves to prove this point. Chances are you had not given the thing much thought until it disappeared, and now that it’s gone, you have no other option but to figure out what it is and how to fix the Microsoft Teredo Tunneling adapter is missing issue.

How to resolve the Microsoft Teredo Tunneling adapter is missing problem in Windows 10?

It is pretty obvious that you need to get the Microsoft Teredo Tunneling adapter up and running again as soon as possible to be able to communicate over the net. The headache that prevents you from doing so might be caused by:

  • missing updates
  • corruption in system files
  • minor glitches
  • missing or outdated drivers

In this article, all the scenarios mentioned above are properly addressed. One of the solutions described bellow will certainly prove helpful in your case.

Make sure to start your troubleshooting with the first tip. Then keep working your way down through the fixes until you stumble across the most efficient one.

Update your OS

This is certainly the first solution to try for two reasons. First, there might be a lot of users that have recently encountered and reported the Teredo Tunneling issue, so there is probably an update designed by Microsoft to be the best means of resolving the problem. Second, your system might have missed some critical updates and might be throwing red flags to attract your attention – chances are this is how your issue with the adapter came to be. Anyway, checking for updates in Windows 10 is quite easy. This is what you should do:

  1. Open your Start menu. Then click the gear icon to invoke Settings.
  2. Click Update and Security to proceed.
  3. In the right pane, locate the Check for updates button and click on it.

Your operating system will search for the updates it needs to run smoothly.

Check your system files

System file corruption is a serious problem capable of triggering multiple issues, including the Teredo Tunneling drama, on your PC. The good thing is, repairing system files is a pretty straightforward procedure since running a short command is enough to get things done:

  1. Press the Windows logo key + X shortcut to open the Power User Menu.
  2. Select Command Prompt (or PowerShell) with administrative privileges from the available options.
  3. Once you are in, key the following command: sfc /scannow.
  4. Press Enter to run the command.

Wait until the system file check is over. Finally, restart your PC and see if the Microsoft Teredo Tunneling adapter is fine now.

Install the adapter manually

If the Microsoft Teredo Tunneling adapter is still missing, installing it manually might be the best way out. Here is how you can perform the trick:

  1. Press and hold the Windows logo key. Immediately press R. This will invoke the Run box.
  2. Into the Run search box, type devmgmt.msc. Click Enter to proceed.
  3. Once in Device Manager, navigate to the Action tab.
  4. From the drop-down menu, select Add legacy hardware.
  5. Click Next to continue.
  6. Select the option Install the hardware that I manually select from a list (Advanced). Click Next to proceed.
  7. Select Network adapters and click the Next button.
  8. Navigate to the Manufacturer pane and select Microsoft.
  9. From the Model menu, select Microsoft Teredo Tunneling Adapter.
  10. Select Next. When the installation is complete, select Finish.
  11. In Device Manager, open the View tab.
  12. Select Show hidden devices.
  13. Then double-click the Network adapter entry to open it.

Now your Microsoft Teredo Tunneling adapter should be visible. If it is not, there is no need to panic. Just move to the following fix.

Re-enable Microsoft Teredo Tunneling adapter via Command Prompt

To perform this fix, you need to open your Command Prompt:

  1. To do this, simultaneously press the Windows logo key and R and then type ‘cmd’ (without quotes) into the Run bar.
  2. Press Ctrl + Shift + Enter.
  3. Click Yes when the User Account Control warning shows up.

Once the Command Prompt window is up, do the following:

  1. Type this command: netsh interface Teredo set state disable.
  2. Press Enter to proceed with the fix.
  3. Once you are done, reboot your computer.
  4. Open Command Prompt (see the instructions above).
  5. Type ‘netsh interface Teredo set state disable’ (no quotes are needed). Hit the Enter button.
  6. Open the Run box (Windows logo + R).
  7. Key devmgmt.msc and press Enter.
  8. Go to the View tab and click the option Show hidden devices.
  9. Navigate to Network adapters and double-click it.

Check if you can see your Teredo Tunneling adapter.

No luck so far? Then keep moving down the list of our fixes.

Configure your Registry

Altered Windows Registry settings are often the culprit behind the issue you are struggling with, so it’s time for you to check if that is actually your case:

  1. Bring up the Run box by pressing the Windows logo + R keyboard shortcut.
  2. Type cmd and press the Ctrl + Shift + Enter combination.
  3. When the UAC window appears, click Yes.
  4. Key in the following command: reg query HKL\Syste\CurrentControlSe\Service\iphlpsv\TeredoCheck
  5. Check if you see the Type EG_DWORD 0x4 line.
  6. If yes, then your adapter is disabled. To turn it on, type netsh interface Teredo set state type=default
  7. If you can’t see that line, input the following: reg query HKL\Syste\CurrentControlSe\Service\TcpIp\Parameters
  8. Now take a look at the DisabledComponents EGDWORD 0x…line.
  9. If its value is not 0x0, the adapter in question is disabled.
  10. To enable it, type reg addHKLM\Sstem\CurrentContrlSet\Serices\Tpip6\Parameters /v DisabledComponents / REGDWORD /d 0x0 and hit Enter.
  11. If the value is 0x0, open the Run box and input devmgmt.msc. Make sure to press Enter.
  12. Click on View. Then select Show hidden devices.

Finally, open Network adapters. Your Teredo adapter should be here.

Reinstall the Microsoft Teredo Tunneling adapter driver

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If you can see the adapter in Device Manager and yet it is acting up, you might wish to ask, “How do I reinstall the Microsoft Teredo Tunneling adapter driver on Windows 10?” Well, the easiest way to do this is by automating the process. For instance, you can use Auslogics Driver Updater to get all your driver issues resolved with the click of a button. That said, for some reason, you might prefer to reinstall the problematic driver manually. To do this, follow the steps below:

  1. Open Device Manager, proceed to Network adapters and right-click the Microsoft Teredo Tunneling adapter.
  2. Select Uninstall to uninstall the device. When prompted, provide your permission to uninstall the driver.
  3. In the end, reboot your PC. The Microsoft Teredo Tunneling adapter will be automatically reinstalled together with its driver.

Now you know how to fix the Microsoft Teredo Tunneling adapter is missing issue.

Should you have any questions regarding the issue examined in this article, do not hesitate to contact us using the comments section below.