Note: The following steps involve modification of registry
key values, which may corrupt your Windows if done incorrectly. Backup registry first before performing the workaround.
- Close all Microsoft Office programs.
- Click on Start button, then click on Run.
- Type “regedit” (without quotes) in the Run text box, and click OK or press Enter.
- Locate and then click the following subkey:
Inside, you will find another subkey that resembles the following subkey:
- Optional: Backup this registry branch by exporting the Registration
subkey to a file, just in case the new product key does not work and
you have to restore back the old product key. To export the registry,
right click on the Registration subkey and click on Export, and follow
the on-screen prompt to enter a file name for the registry file and
choose a location to store 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
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 Proffesional 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:
- Exit Registry Editor.
- Run or open an Office application program, such as Word or Excel or Outlook. Office 2007 will prompt you to enter a new 25-character product key.
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