Troubleshoot “connection to KMS server failed” error

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I have received a lot of complaint emails saying that they could not activate their program after folowing instructions in my videos. The issues described here are related to an error message they got as below.

The connection to my KMS server failed! Trying to connect to another one… Please wait…
Sorry! Your version is not supported.

There are two main causes of this issue.

1. The cause of client
First of all, please make sure that Windows Update is enabled and your intenret connection is stable. To check if my KMS servers are blocked or not, please open your internet browser then try going to: http://kms8.msguides.com. If the page is visible, it means this server is not blocked.
One other point to note is that you need to run command prompt/batch file with admin rights.

make sure your ran batch file with administrator rights

Otherwise, the connection will be denied by UAC system.

2. The cause of server
Recently I need to do some experiments in the kms7 server so I changed the default KMS port (1688) to another one. And besides, I upgraded CPU and RAM memory on the kms8 server.
Because the number of daily clients is too big and still increasing over time, so the server can also be stuck at times. You can check and see if the server is overloaded or not here: http://status.msguides.com.

If you feel that your problem still hasn’t been fixed yet, just email me at msguides.com@gmail.com.

If you would have any questions or concerns, please leave your comments. I would be glad to explain in more details. Thank you so much for all your feedback and support!


For faster support, please visit here for troubleshooting. Need more help? Please email me at msguides.com@gmail.com

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117 thoughts on “Troubleshoot “connection to KMS server failed” error

  1. abrar

    hi so i tried everything that you mentioned above and my problem still isnt fixed it still says your version is unsupported , please help

    Reply
    1. kWong

      Activation success must run batch activation method with admin right without change any setting online.

      Fail can reactivate until success.

      Reply
  2. Ameer Hamza Khetran

    I have saved a batch file and I am running it as Administrator but it says “The connection to my KMS server failed! Trying to connect to another one…
    Please wait…”
    It appears 3 times then it says “Sorry! Your version is not supported.”
    How can I activate my windows ?
    I have Windows 10 Pro

    Reply
    1. kWong

      Activation success must run batch activation method with admin right without change any setting online.

      If still fail, which method you use for activation?

      Any error come out?

      Reply
    2. kWong

      Activation success must run batch activation method with admin right without change any setting online.

      Fail can reactivate until success.

      Reply
  3. kanishk taneja

    hey its showing the connection to my server is failed and your page is also not opening so please help me out how i can unblock the server

    Reply
        1. Kanishk

          Just unblock the cookies or add which is blocked in chrome and internet explorer or whichever brkwser you are using just go to browser setting unblock the add popups so that whie executing it can get access

          Reply
  4. JymmyD

    I’m struggeling too. The same KMS server failed problem.
    I’ve searched the error code 0xc004f074
    and found this article: https://support.microsoft.com/nb-no/help/974998/when-trying-to-activate-you-get-0xc004f074-with-description-the-key-ma

    There is one key element here:
    ___ This error also can occur when there may be a time difference between the KMS client and KMS host machine. The error 0xC004F06C listed in the info section may occur if the difference between system time on the client computer and the system time on the KMS host is more than 4 hours.____________

    So, can you please tell us wich time zone your server is in. I’m in Europe, maybe you are somevere else..

    JimmyD

    Reply
    1. KWong

      Error code 0xC004F074 repair windows

      Error 0xC004F06C, KMS determined that the request timestamp is invalid
      Since the Volume Activation Error message says “The system time on the client computer is too different from the time on the KMS host” the problem is very straightforward. The system time on the client computer i.e. yours is too different from the time on the KMS host.

      Time sync is always important. Be it on with the Internet Time Server or when you are with the Enterprise. Since your enterprise computer depends on a lot of things from the server, including security, it has to be in sync with it.

      To fix this, you need to change the system time on the client to sync with KMS. This error suggests that you are using UTP or and is independent of Time Zone selection.

      Network Time Protocol (NTP) time source

      To use NTP time source on your client machine, you can change registry settings on your computer.
      Open Registry Editor and navigate to: HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient
      Change the value for “Enabled” to 1. This means the NtpClient provider is enabled in the current Time Service.
      If you are not able to edit registry settings, you will have to connect with the admin to resolve this.

      Active Directory Domain Services Time Source

      To find out if your client is using ADDS time source, you need to examine the REG_SZ value.

      Open Registry Editor and navigate to at HKLM\System\CurrentControlSet\Services\W32Time\Parameters\Type.
      Check the value REG_SZ. If it is set to “Nt5DS” then the computer is synchronizing time with the Active Directory time hierarchy.
      If it’s not the same, you need to connect with Admin to get it configured correctly.

      Once the client is in sync with the KMS server, your activation error 0xC004F06C should be resolved.

      Reply