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How to Change Your Windows Product Key After Install & Activate

March 11, 2013

If you ever run into a situation where you need to change your product key so you can activate windows, there’s a simple command line technique to do so.  Simply open a command prompt and type in “slmgr.vbs –ipk [product key]

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After a few moments, the following message should appear.

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When you’re done that, type “slmgr.vbs /ato” to activate windows (see below)

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And the following message should appear shortly afterwards if you did everything right.

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This works on Windows Vista, Windows 7, and Windows 8.

27 Responses

  1. Vinay says:

    Thank you very much. It worked.

  2. Joe says:

    It doesn’t work for me. I get: “Error: 0xC004F025 Access denied: the requested action requires elevated privileges”. Any ideas?

  3. Raja Bilal says:

    i m receiving this error .. kindly help
    ‘slmgr.vbs’ is not recognized as an internal or external command,
    operate program or batch file.

  4. S Brown says:

    I also get the same error and I am running the cmd as admin. Is it because the product key I have has already expired?

  5. R Sodhi says:

    Hi i tried your method and every thing went well till the last window.
    It shows
    Activating Windows(R) 7, Professional edition
    (xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx)….
    Error: 0xC004c008 The activation server determined that the specified product key could not be used.
    Thanks

    • MMMan says:

      Sounds to me like your product key could’ve been activated too many times already. Typically if you call the Microsoft software activations department, they can help clear that up for you.

  6. Michael says:

    Thanks. Spent three hours on this. After going into start -> and -> cmd.exe and then typing the ‘slmgr.vbs’ line with the new product key, DO NOT push the enter key, but instead push Ctrl+Shift + Enter. This is running a command as Adminstrator and was what I was doing wrong for 3 hours.

  7. Dev Goswami says:

    I followed th same step to change my windows key and this dialogue box is apprearing

    On a computer running Microsoft Windows non-core edition, run ‘slui.exe 0*2a0*C004F015
    Error: 0*C004F015

    Sir plz help
    What to do now?

  8. Stan BG says:

    It is not worked on already activated windows 7.
    I need to change key after activation.
    Regards1

  9. SHAHID says:

    THIS IS AWESOME

    Thanks thanks thanks

  10. Sachin says:

    Thanks,

    I followed the same steps to change my windows key

    it Works…….

  11. MASUD says:

    Thank you so much.

    Its works..

    You are genius 🙂

  12. bala says:

    hi, i m run in admin. i got the error“Error: 0xC004F025 Access denied: the requested action requires elevated privileges”.

  13. eric says:

    i got an error that “no dns severs cofigured for local system”
    please help me

  14. Ravi says:

    it says: Error: product activation failed…
    after entering product key in cmd….

  15. Read at your own risk says:

    My laptop’s previous owner upgraded it to windows 8. If I change it to the product key on the back of the laptop, will there be a problem?

  16. Shailendra says:

    i m receiving this error .
    ‘slmgr.vbs’ is not recognized as an internal or external command,
    operate program or batch file.

  17. kingsley says:

    what if u don’t have an activation key. what do u do

  18. i m receiving this error .
    ‘slmgr.vbs’ is not recognized as an internal or external command,
    operate program or batch file.

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Colin Phillips

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Colin Phillips

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