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How to Change an Office 2010 License/Product Key


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Issue: You go to activate Microsoft Office 2010 and you receive a message stating, “Your copy of Microsoft Office Professional Plus 2010 cannot be activated because the specified Product Key has already been activated the maximum number of times permitted for your software license as specified in the Microsoft Software License Terms.”



The solution is to change the product key to another product key. I will show you three different methods of changing the License Key

Method 1

Open “regedit”

Navigate the registry to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Registration\ and delete the whole “Registration” key located under the “14.0” key

Right click “Registration”

Select “Delete”

Press “Yes”


Close Regedit, Restart an Office 2010 application. You should be prompted to reenter your License Key


Method 2

Open to Microsoft Word

Press “File”

Press “Help”

Select “Change Product Key” (this option was not here on my installation, I used Method 1)


Method 3

Click on Start Menu > Control Panel > Programs and Features (or Add/Remove Programs, depending on your operating system).

Click on your product, e.g. Microsoft Office Professional Plus 2010

Click “Change” on the top menu.



Select the option to “Enter a Product Key.”

Press “Continue”


Changing your Product Key

Once you complete one of the Methods listed above you should be able to change your Product Key

Enter the appropriate product key from the top of this page and click “Continue.”


Accept the agreement

Press “Continue”

Configuration will occur

Press “Close”

Select “I want to activate the software over the Internet (recommended)”

Press “Next”

Your product should activate successfully

Press “Close”






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67 Comments so far

    • morgoth7 said:
    • Posted on December 2nd, 2014 at 11:35 am
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    • contributor#7 said:
    • Posted on November 19th, 2014 at 6:12 am
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    Off ProPlus2010 key registered fine as an upgrade under winXP but moving on to win7 it wouldn't register through any method.
    MS 'help' agent would only say my key wasnt valid and no other info. yet I had been using for 12 months on old disc winXP. Installs but doesn't validate now. This is very suspicious.

    Thank you Sam (above) for info cscript tweak but it looks like a new key needed for me. Will try again with Microsoft 'guru' first.

  1. All really Rock!!!

    • Ravinder Kumar said:
    • Posted on November 12th, 2014 at 3:48 am
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    Thank you very much, Great Instructions

    Option 3 works for me.

  2. Method 3 worked for me. Thanks.

  3. Option 1 didn't work for me, Option 2 wasn't available but Option 3 worked! Thanks.

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