Re-Activate and Existing Installation of Microsoft Office 2010

I ran into an interesting problem after using terabyte unlimited image for Windows to transfer my installation from a 1TB drive to a 2TB Drive and I have used it many times without any issues. When I opened Office I received a notification that I had 3 days to Activate Microsoft Office 2010 Professional Plus and when I attempted to activate over the internet I received another notification that I had exceeded the number of licenses available, which luckily for me was wrong. So I logged in retrieved another Product Key (PID) and followed the instructions below to resolve the issue.

On Microsoft Windows 7 Click Start > Control Panel > Programs > and from the list of installed programs, find Microsoft Office Professional Plus 2010 (or your installed version of Office) > select the correct version and click Change.

change product key office 2010


  • From the newly opened dialog box, select the Enter a Product Key (PID) option, and then click Continue.
  • Type your new product key and check the option that says Attempt to automatically activate my product online to automatically activate your Installation of Office 2010 . Then click on Continue and Install Now.
  • Note: Your computer must be connected to the Internet if you want to activate Office 2010 online.
  • Most people have written you can also activate Office 2010 later by running any Office 2010 app, and then clicking on the File tab > Help. However, after changing the name of my computer and imaging onto a larger drive I was unable to change the PID unless I followed the steps above and completed a new install.



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