Changing Office 2007 CD KEY without Re-install it.

I found the following solution on the Internet. This describes an other error, but it gave me the ability to reenter a new Product Key.


Follow these steps:


  1. Close all Microsoft Office applications.

  2. Click Start, click Run, type regedit in the Open box, and then click OK.

  3. Locate 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.

The next time that you try to run an Office application, you will be prompted for a new product license key. Then, you can enter the product license key.