Change the Office 2007 CD Key

I had a situation where I had entered the office CD key for the wrong computer in the office onto another computer (I hate having 10 different license keys). When trying to activate I would get an error. My options were uninstall and reinstall, call Microsoft Support and have them laugh at me for being stupid or do the following steps below.

To change the office 2007 CD key follow these steps:

1. Make sure all Microsoft Office applications are closed.
2. Click Start, click Run, type regedit in the Open box, and then click OK.
3. Navigate to the following registry subkey:
   HKEY_LOCAL_MACHINE\Software\Microsoft\Office\12.0\Registration

   Note You may also find another subkey that resembles the following subkey:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Registration\{91120000-0011-0000-0000-0000000FF1CE}

4. If you find additional subkeys that reference Microsoft 12.0 registration, open each subkey, and then identify the product by the ProductName entry.
   For example: ProductName=Microsoft Office Professional Plus 2007
5. When you find the subkey for the product from which you want to remove the existing product license key, delete the following entries:
   • DigitalProductID
   • ProductID
6. Exit Registry Editor.

Now open up any of your Office 2007 applications and you will be prompted for a new product license key. Pop in the correct key and Click Continue then Install Now. After a short period of time Office will be reconfigured and you can reactivate Office.

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