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Konstantinos Tsoukalas

Konstantinos is the founder and administrator of Since 1995 he works and provides IT support as a computer and network expert to individuals and large companies. He is specialized in solving problems related to Windows or other Microsoft products (Windows Server, Office, Microsoft 365, etc.).


  1. Benny Largo
    July 1, 2020 @ 4:49 am

    I tried Step 1 (regedit) and it seems to have worked. Thanks for making an easy to read guide with pictures. Also the comments on this site are very helpful. I'll let you know if I have any further problems, but for now Step 1 (regedit) has my internet working again.


  2. Mo Jo
    February 22, 2020 @ 3:20 pm

    First two pieces seemed to work. It does go hidden but it's there. Cool.


  3. Chris
    September 13, 2019 @ 4:00 am

    Thanks, regedit and a reboot worked tickity boo.


  4. JimV
    March 22, 2019 @ 8:19 pm

    Thanks VERY much — that particular glitch had bedeviled a Win7Ult desktop of mine for months, and none of the other so-called "expert" websites (including MS) proved to be relevant or worthwhile, but this fix worked!


    • JimV
      March 26, 2019 @ 9:57 pm

      Well, it did work just fine, but the problem had resurfaced when I checked Device Manager earlier today so I had to perform the registry edit again. After rebooting, the flag and error code was gone so for now all is okay. I'll keep checking periodically, but there may be something else at work in producing the intermittent failure of that particular adapter's functioning.


    • JimV
      March 27, 2019 @ 12:07 am

      A further update — I discovered that two services on that machine ('Peer Networking Grouping' and 'Peer Name Resolution Protocol') were not started, and in one of the many other threads on this issue these two services were identified as potential accessory culprits for the problem. So, I've changed them both from "manual" to "automatic" and rebooted — there are no flags in Device Manager, and I'll monitor it periodically and see if the combination of fixes has finally resolved the problem for good.


  5. Terri W
    February 17, 2019 @ 5:34 pm

    Got it the first time I followed your directions. Thank you very much


  6. Prasad KVV
    October 23, 2018 @ 2:13 pm

    Thank You
    Completed successfully with first stage


  7. joe
    September 29, 2018 @ 11:33 pm

    thanks aloot


  8. UDX
    July 19, 2018 @ 9:13 am

    Thank you ☺
    it is working…… !


  9. Nonso
    June 22, 2018 @ 6:31 am

    Can't say thank you enough


  10. Ai Burritt
    March 10, 2017 @ 1:53 pm

    Thankfulness to my father who told me on the topic of this website, this website is truly remarkable


  11. Mark
    December 9, 2016 @ 7:03 pm

    Sadly this did not work for me either. I can't get any sense out of Microsoft Support either.
    In situations llike this IO simply get a Pirate Copy Of Crap Windows and re-install. Always works


  12. Trish
    September 21, 2016 @ 1:58 am

    Thank you!


  13. peredo
    August 12, 2016 @ 6:09 pm

    Hey for me the solution came from another site but they didnt say the first part now my teredo.. Option is disappeard even i did all i mean ipv6 … And show hidden devices.
    So is there any solution for refinding it and solving its yellow color?


  14. Isaiah Garcia
    June 25, 2016 @ 12:16 pm
    The problem I have is that "DisabledComponents" does not show up in the right pane, as many tutorials suggest otherwise.


    • lakonst
      June 25, 2016 @ 1:13 pm

      @Isaiah Garcia: Right click at an empty space (at the right pane) and select New > DWORD Value. Name it "DisabledComponents" (without quotes). Then set the value data to 0.
      Restart your computer and tell me the results.


  15. Muhammad Affan
    June 24, 2016 @ 7:21 am

    thanks dear :-)


  16. Billal Dwika w
    June 13, 2016 @ 9:28 am

    Thank You A Lot !!!! You're The best


  17. Smulik
    June 12, 2016 @ 12:43 pm

    You are a king!
    I spent more than 4 hours in trying to solve this nagging problem.
    Most of my effort focused on shutting down and restart computer and router, but nothing really helped.
    Out of desperation I contacted technical support center of my Internet provider, and after millions tests, I was told that my network card is burned and that I should contact a computer technician to take care of my computer.
    Frustrated and furious, I decided to try and find a mention of to this problem on the net, and so I got your explanation.
    A very simply and detailed explanation of which accompanied me step by step finally to a complete solution of the problem.
    Thus I wanted to thank you so heartily and say well done!
    You helped me very much, Shmulik.


  18. Prince
    June 11, 2016 @ 6:24 am

    I tried all above steps the yellow exclamation mark gone but still iam unable to connect to wifi . it is showing WiFi users but not accepting password


    • lakonst
      June 11, 2016 @ 11:14 am

      @Prince: 1. Unplug the router from power for 30sec. Then try to connect to Wifi. or 2. Download and install the latest drivers for your WiFi card.


  19. Dan
    June 7, 2016 @ 9:45 am

    It worked thank you very much


  20. Hairy
    June 2, 2016 @ 5:44 pm

    thanks very much xxx


  21. Freddy Towers
    May 24, 2016 @ 3:42 pm

    Thanks a ton, bro! Mine was fixed by step 1. Lifesaver!


  22. Hendr.
    May 19, 2016 @ 1:27 pm

    Thank You so much brother… it's works for me,,


  23. Nirmal
    May 5, 2016 @ 4:02 pm

    Thanks it works ….


  24. Andrew
    April 14, 2016 @ 1:15 pm

    Teredo tunneling adapter is fine, Thank you. However I still have problem network printer.


  25. Mister Mister
    April 13, 2016 @ 7:41 am

    Ok, so i did everything above but after step 3 I don't see the Teredo Tunneling Pseudo Interface in the list even after clicking show hidden devices. Any ideas?


    • lakonst
      April 13, 2016 @ 12:04 pm

      @Mister Mister: Give all the commands mentioned on step 3.


      • Mister Mister
        April 13, 2016 @ 6:48 pm

        I did all of it. The Pseudo Interface doesn't show up.


  26. billy
    April 13, 2016 @ 1:09 am

    good job! thanx


  27. el mustachio
    April 6, 2016 @ 10:12 am

    I cant find the disabled components in the TCPIP6/Parameters … Please Help !


    • lakonst
      April 6, 2016 @ 4:04 pm

      @el mustachio: Right click at an empty space (at the right pane) and select New > DWORD Value. Name it "DisabledComponents" (without quotes). Then set the value data to 0.


  28. malaysia
    March 30, 2016 @ 6:51 am

    it is a well done instruction!!!!!!!!!
    thanks for sharing admin!!
    kudos to admin!!


  29. Clifton Jamison
    March 10, 2016 @ 12:39 am

    Thanks for the well done instructions.I used them and now my Teredo at least doesn't have the yellow triangle.I guess where I'm accessing doesn't have IPV6.Status shows it's default gateway "blank".


  30. Phillip Burdine
    March 8, 2016 @ 11:50 pm

    Modifying the Registry worked perfectly, thank you.


  31. Marcin
    March 5, 2016 @ 8:26 am

    Thank you Lakonst,

    I checked it before teredo repairing and I always have obtain IP Address Automatically.It still does not work.I'll try to scan my komputer.


  32. Marcin
    March 4, 2016 @ 3:59 pm

    I had problem with tetedo (code 10) and with access to internet (Wi-Fi in hotel and friends house) yellow exclamation mark on the bottom menu. I did step 1 and tetedo is ok, however I still have yellow exclamation mark on the bottom menu and still do not have access to internet. What can I do more?


    • lakonst
      March 4, 2016 @ 8:40 pm

      @Marcin: Try these steps:
      1.Navigate to Network & Sharing Center > Changer Adapter properties.
      2. Right-Click on your Wi-Fi afapter > Properties
      3. Select the TCPIP IPv4 Protocol > Properties
      4. Select "Obtain IP Address Automatically" & "Obtain DNS Server Address Automatically" and press OK (twice) and close Adapter properties.
      5. Restart your computer.
      If you still cannot access the Internet then scan our computer for malware by using this guide:
      Good luck!


  33. PB
    February 26, 2016 @ 8:18 pm

    Microsoft teredo tunneling adapter is fine on mt pc. However there is not a Teredo Tunneling Pseudo-Interface. Is that needed? If so how do i install it? I went through your steps and i still do not have it.


    • lakonst
      February 27, 2016 @ 11:10 am

      @PB: If you're already able to use the internet without issues, then you don't need it!


  34. Lila
    February 16, 2016 @ 12:13 am



  35. nick
    February 1, 2016 @ 12:26 pm



  36. David Spencer
    January 17, 2016 @ 1:52 am

    Thank you, it worked for me on a Dell running Win 7 Ult, 64 bit


  37. Janae
    January 15, 2016 @ 5:36 am

    Hi! I logged into the administrative account. I managed to continue after setting the value to 0 and selecting OK. Afterwards, I restarted the computer, went to Computer Management, and selected show hidden devices. I noticed the Microsoft Teredo Tunneling Adapter disappeared. The only thing I see now is Teredo Tunbeling Pseudo-Interface. That's it. Did I make a mistake? What should I do? Thank you.


    • Janae
      January 15, 2016 @ 5:38 am

      I'm sorry, I did not read your instructions clearly! I apologize.


    • lakonst
      January 15, 2016 @ 6:10 pm

      @Janae: Proceed to Step 3.


  38. Janae
    January 14, 2016 @ 6:48 am

    Hi! I followed your steps perfectly to the step where I set the value at zero and select OK. Once I clicked OK, a tab appeared named 'Error Editing Value'. Then inside the tab it said "Cannot edit DisabledComponents: Error writing the value's new contents." I don't know what the problem is. I'm logged onto the second user (the non-administrative one but that doesn't seem to be the problem). What am I suppose to do? Can I fix this?


    • lakonst
      January 14, 2016 @ 10:11 am

      @Janae: Login with the user with the administrative privileges.


  39. zander moncrieff
    December 23, 2015 @ 7:30 pm

    Hi guys
    I was thinking that the possible cause for the code 10 might be
    that you haven't updated your windows software for a few months,
    is this possible?


  40. Nandu Karande
    December 23, 2015 @ 9:23 am

    I have same problem regarding Microsoft tereno tunnelling driver not working (code 10)
    I follow this instruction..after 1st restart problem solved, but 2nd restart error shows again

    Please suggest final solution


  41. Not bit
    December 10, 2015 @ 8:19 pm

    I have the same issue and my internet won't work, it says it's connected but no connection I have tried in other devices and no problem with the wifi!!
    I checked network adapters and had the same error, I followed the steps above and everything is fine with the teredo tunnelling pseudo – interface but for some reason I can still not get connected to the Internet!!!

    It is really strange as everything was working properly yesterday does any one have a solution???



    • lakonst
      December 10, 2015 @ 8:56 pm

      @Not bit: Check your computer for malware by using this guide. Specially with "Rogue Killer" utility (Step 2) go to "Hosts File" tab and click "Fix Hosts File".


  42. Zander
    November 25, 2015 @ 5:37 pm

    Thank you so much guys – worked perfectly!


  43. Johny BIG
    November 20, 2015 @ 8:40 pm

    Ohh YEAH IT'S solution only for the NEXT RESTART :) After the NEXT RESTART you have the same problem with Teredo Tunneling…..SO FUCK OFF, because there is NO solution for this SHIT!!! Fuck off microsoft. Microsoft is the worst shit ever. People need APPLE machines. Bye!


  44. Edwin
    October 23, 2015 @ 9:19 am

    Great, worked first time. Thank you, Best Regards.


  45. Bart Bates
    October 16, 2015 @ 12:07 am

    I am a total ignoramus when it comes to much more than just turning the danged thing on & hitting my AOL icon to log on. Therefore "toredo not working" had me buffaloed. I called Comcast, & a guy there said reboot your modem, & then reboot your PC, and dot dot dot viole (can't put that thingie over the e-sorry), I'm back on the net. Apparently, a simple solution for a simple mind! Hope it continues to work. If not, I'll review all the above.


  46. kristian
    September 29, 2015 @ 7:36 am

    did the first method and now my computer wont boot and i cant repair it …thanks


    • lakonst
      September 29, 2015 @ 9:06 am

      @kristian: Power On your computer and press F8 to enter Advanced Boot Options. Choose Repair My Computer. Let the System to perform an Automatic Repair or Restore your computer to a previous working state.


  47. chutikarn
    September 17, 2015 @ 4:53 am

    I have been made it but it show word
    "Cannot edit DisabledComponencts:Error writing value's new contents.
    It meaning?


    • lakonst
      September 17, 2015 @ 12:47 pm

      @chutikarn: Are you an Administrator?


  48. Robert
    August 24, 2015 @ 4:23 pm

    Many thank's, so far it seems to have worked.


  49. anil
    August 18, 2015 @ 5:13 pm

    Thanks a ton , simple instructions and problem solved


  50. Dave
    August 10, 2015 @ 2:32 am

    Per your detailed instructions, modified registry, rebooted, uninstalled adapter, rebooted, checked hidden devices and windows reinstalled the adapter and it is working properly.
    Thank you so much!


  51. Travis
    August 7, 2015 @ 1:54 pm

    Thank you!! :-)


    • Shahid
      October 7, 2015 @ 11:32 pm

      Thanks my computer is working


  52. Anton
    August 4, 2015 @ 7:24 pm

    This worked for me

    1. Open the command prompt

    2. Type in “netsh winsock reset” (without the quotes)

    3. After resetting winsock, Restart your computer.

    Worked on Windows 7 x64

    Not taking any credit, found on this site:


  53. Ayush
    July 29, 2015 @ 2:23 pm

    after following your 2nd method that is cmd one. my teredo file is not showing in my device manger after enabling hidden file. now what shall i do?


  54. Pa
    July 16, 2015 @ 4:56 am

    I just want to add my solution here in case anyone else has this problem. I fixed it extremely easily by simply looking at the registry of a working win 7 laptop. Just delete the registry key in the photos in step 1 named DisabledComponents. In my registry, the EnableICSIPv6 registry key was absent altogether, so I created it by right clicking in the white space and clicking DWORD. Then you rename it to EnableICSIPv6, enter 1 as the value and click the Hexadecimal radio button. The exclamation on the Teredo Tunneling device is gone and there appear to be no issues.


  55. Link
    July 4, 2015 @ 3:13 pm


    Before seeing you last reply instructions, I tried all three steps once more and found that after restarting the computer, the registry value was no longer auto changing itself, but that also the Teredo adapter was not installed. I reinstalled the adapter AGAIN, and restarted. The registry value mystically has stopped changing itself, and the adapter is installed and working. After a week of restarts, it has not malfunctioned again. So, thanks! No idea what fixed it, but all's well.



  56. Link
    June 23, 2015 @ 1:38 pm

    Worked flawlessly. I appreciate the very detailed and clear instructions. I wasn't even sure what that adapter did or why it suddenly started not working, but I'm glad my PC is once again free of any yellow exclamation signs.

    Any idea what caused it to malfunction?


    • Link
      June 24, 2015 @ 7:44 am

      Okay… I was mislead. It appeared to work for that day, but today, when I turned the PC back on, the adapter once again is giving the Code 10 (cannot start). So, me donating above through PayPal was a waste. What gives? Why is this adapter suddenly not working?

      Brand new PC: Asus Maximus Impact VII, Intel i7 4790k, nVidia GTX680, 16GB of Kingston Beast DDR3 RAM, Windows 7 x64 Home Premium on a 1TB Samsung 850Evo SSD.


      • lakonst
        June 24, 2015 @ 11:17 am

        @Link: I' m really sorry for your problem. Do you have any firewall program installed? If, so please uninstall it. (like AVG or Zone Alarm? specially in ZA your have to Enable IPv6 checkbox in Firewall).
        1. Make sure that all your drivers are updated.
        2. Make sure that the IPv6 is enabled in network properties.
        3. Set the value to 0 in registry and then restart your computer. (do not uninstall/re-install teredo) If the problem persists then…
        4. Give these commands (in order, as Admin) and then restart your computer:
        int teredo
        set state disabled
        int ipv6
        set teredo client


        • Bradley Brewer
          June 25, 2015 @ 11:46 am

          I had replied with more information, but it seems y'all deleted it.

          The only security programs I have installed are the same one's I've been using for years: Window's Firewall, Avast Free Antivirus, and Malwarebytes Anti-Exploit Free. I have checked through and through them looking for anything dealing with IPv6 options and there is nothing restricting listed.

          1. My drivers are all up to date, as always, on both computers on my network.
          2. IPv6 is enabled on both computers.
          3. I have done that step multiple times. It always works for ONE reboot. After the computer is again restarted, the registry value automatically changes back to 8e, and, subsequently, the Teredo adapter gives a code 10.
          4. I have also done this to no success.

          I also cannot connect to a Homegroup with either computer. I can start one on both, but neither shows that there is a Homegroup on the network… even though I can see both computers and peak into their folders from the other computer. They are both on the same "Home" network. They are both on the same Workgroup.

          I have a Netgear Nighthawk R7000 802.11ac router and I've also checked through that for anything reguarding IPv6… nothing is restricted. I've restored everything to defaults. I tried setting various options on and off… I've spent at least 6 hours trying to figure out what's gone wrong and why that registry value keeps auto-changing itself back to 8e from 0.

          I cannot think of anything I've done recently, since when I noticed the device wasn't starting, that I've changed from my normal habits. I can't think of any new programs I've tried out.

          Everything I find through Google is from around 2011 to 2013, and the instructions to fix it are the same as listed here, or to simply disable the adapter, as apparently, it's not needed.

          Thanks for the response.


          • lakonst
            June 25, 2015 @ 2:01 pm

            OK then. Let’s find which process modifies the registry.
            1. Open an elevated command prompt and run the following command:
            auditpol /set /subcategory:"Registry" /success:enable
            2. Then Open Registry Editor and navigate to this key:
            3. Select the “DisabledComponents” key.
            4. From menu choose: Edit > Permissions
            5. Choose “Advanced”.
            7. Choose the "Auditing" tab
            8. Click “Add”
            9. Type “Administrators” on the box and click OK.
            10. Click the “Set Value” checkbox at “Successful" column and press OK.
            11. Apply settings and press OK to Exit.
            12. Now change the “DisabledComponents” value to 0 and select OK.
            13. Close Registry Editor and restart your computer.
            After Restart:
            1. Open Event Viewer > Security
            2. Select “Registry” line(s) (Task Category) to find out which process (Process Information) modifies the “DisabledComponents” registry value.
            Good luck!

      • Hairy
        June 2, 2016 @ 5:43 pm

        Thanks very much xxx


  57. Bob
    June 20, 2015 @ 6:56 pm

    Thank you for this!!! I owe you !!!


  58. Aditi
    June 15, 2015 @ 8:10 am

    Thanks a ton!!!


  59. Lisa Newlin
    May 30, 2015 @ 5:40 pm



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