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You may need to alter or change the Microsoft Office 2007 product license key. Use the following steps to reset it without uninstalling or reinstalling.
Run "Regedit" and locate and then click the following subkey:
HKEY_LOCAL_MACHINE \Software\Microsoft\Office\12.0\Registration
Inside, you will find another subkey that resembles the following:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Registration\{30120000-0011-0000-0000-0000000FF1CE}
** You may want to export the regitry key before modifying it
Under the Registration subkey, there may be several Globally Unique Identifiers (GUID) subkey that contain a combination of alphanumeric characters. Each GUID is specific to a program that is installed on your computer.
If you find additional subkeys that reference Microsoft 12.0 registration, then click and open each GUID subkey to view and identify the Office product version by the ProductName registry entry in the right pane. For example:
ProductName=Microsoft Office Professional Plus 2007
After you find the GUID subkey that contains your Office product or program which you want to remove the existing product license key or registration details, delete the following registry entries by right clicking on the registry entry in the GUID subkey, click Delete, and then click Yes:
• DigitalProductID
• ProductID
Exit Registry Editor.
Run or open an Office application program, such as Microsoft Word or Excel or Outlook. Office 2007 will prompt you to enter a new 25-character product key.
Type in the valid and genuine product key, and then click OK.
Then when prompted to choose your preferred type of Microsoft Office 2007 installation, press on “Install Now”.
Microsoft Office 2007 will be updated with new product CD key or volume license key, and ready for activation (if it’s a non-VLK serial) or use.
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