Change Product Key in Microsoft Office
1. Go to start and run and type in regedit and click OK.2. Go to HKEY_LOCAL_MACHINE\Software\Microsoft\Office\12.0\Registration
3. You may find multiple instances of HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Registration\{91120000-0011-0000-0000-0000000FF1CE}if you do open each one and look for ProductName entry
Example: ProductName=Microsoft Office Visio 2007
4. When you find the correct subkey delete the following entries DigitalProductID, ProductID
5. Close regedit and open up your MS application that requires a key change and it should prompt you for the new Key.
