Error 0xC004F061, Unable To Use Product Key For Clean Install

Microsoft follows the policy of one key for one Windows activation. This means only a single key can be used for one installation. Suppose you installed Windows on multiple hard drives of a same computer, you won’t be able to activate all copies, using the same key, because of this policy. Again, some keys can be used for upgrading your Windows only and not for new clean installations. If you, you may get an Invalid Product Key Error Code: 0xC004F061.

Invalid Product Key Error Code 0xC004F061

FIX Error 0xC004F061 Error 0xC004F061, Unable To Use Product Key For Clean Install

Since you’ve bought a new license, such error shouldn’t be faced. But unfortunately if you’re facing one, then we’ll tell you the way to fix it, here is how:

Error 0xC004F061

1. Press Windows Key + R combination, type put Regedt32.exe in Run dialog box and hit Enter to open the Registry Editor.

2. Navigate to the following location:


FIX Error 0xC004F061 1 Error 0xC004F061, Unable To Use Product Key For Clean Install

3. In the right pane of this location, you’ll see MediaBootInstall named DWORD, which is having Value data as 1. Double click on this DWORD to modify it:

FIX Error 0xC004F061 2 Error 0xC004F061, Unable To Use Product Key For Clean Install

4. In the above window, replace the Value data to 0 from 1. Click OK. Close the Registry Editor.

5. Now open administrative Command Prompt, type following command:

slmgr /rearm

FIX Error 0xC004F061 3 Error 0xC004F061, Unable To Use Product Key For Clean Install

6. After hitting above said command, hit the Enter key and you’ll receive following prompt:

FIX Error 0xC004F061 4 Error 0xC004F061, Unable To Use Product Key For Clean Install

7. In case you’re asked to enter product key, then do it and reactivate Windows. Click OK in above shown window and reboot the system. After reboot, your error should be fixed now.

Hope this helps!

Posted by on , in Category Windows with Tags
An Electrical Engineer by profession, Kapil is a Microsoft MVP in Windows - Consumer and a Microsoft Content Creator. He recommends that you create a system restore point first before tweaking the registry.
  • nickhell

    Thanks that worked!

  • Kapil Arya

    ^^ Glad we could help :)

  • molly

    Thank you!!

  • Kapil Arya

    ^^ Cool :)

  • Daksh

    i couldnt find OOBE after setup :/ please help
    Please reply ASAP

  • steven

    Hi it doesn’t work for me, what should i do? :(

  • Kapil Arya

    ^^ Create that sub-key manually.

  • Kapil Arya

    ^^ I think you’re missing something, please re-try the steps and let us know at which step you’re having issues :)

  • Long Duckdong

    Worked for me, thanks for sharing. I might note that the online activation STILL didn’t work, but I was offered the method to use automated phone activation, and that worked. DAMNIT I’m glad I switched to Mac 15 years ago…..

  • Tyler

    Just wanted to say this worked for me in July 25th, 2014; had Win7Ultimate x64 upgrade-only, and this trick let me activate Windows successfully during a fresh installation on a new build.

  • Kapil Arya

    ^^ Thanks for feedback :)

  • khalid al-obaid

    It’s working with me
    thank you for the psot

  • Sherry

    It didn’t work for me. When I typed slmgr /rearm, an error code of 0xC004F025 came up saying that the requested action requires elevated privileges even though I”m admin

  • Kapil Arya

    ^^ Make sure you still have the admin power in your hands. If not, refer:

  • TH

    quick question – How do I tell if it worked?

  • TH

    I see – open the Windows Activation and “Change Product Key”. Enter the valid product key and enter. It tickles MS for a minute then responds with SUCCESS. Thanks a ton.

  • Sam

    What I did with mine was typed in “cmd” on the Search box. But don’t press Enter, instead hit Ctrl+Shift+Enter. It will take you the the same screen as shown above. Then you just have to type in slmgr /rearm and there you go! :) Hope this helps. Got the tip from:

  • SR

    Thank you! It worked!

  • Kapil Arya

    ^^ Glad we could help :)

  • Mike Zerotwonine Tat

    Didn’t work for me. this error gone and was replaced by other 0xC004C008 something like “activation server found that this key cannot be used”. how to fix this?

  • Cory Griffin

    Worked but now I cannot use windows update?

  • fetzpatrick

    Thanks a lot!!!

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