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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

  1. Thanks for the tip. I tried Method 3 first since it seemed easiest and it worked very nicely!!

    • swissblue said:
    • Posted on October 26th, 2016 at 7:06 am
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    Very good. 3 option. Many thanks. Save my day …

  2. Thank you, i tried several times with options 2 and 3 before, it didn’t work and then found these tips (option 1).

    Very useful. Best

  3. Can t do it. Dont umderstand how to do it. You could make it automatically.

    • jim lackey said:
    • Posted on August 3rd, 2016 at 5:30 am
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    method 3 worked perfectly

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