If you already activated Office, you'll need to reactivate it using the correct key. Open the application (any of the Office applications if you changed the suite key) and enter the correct CD key. Look at the data values for the application name, then delete the two ProductID keys – ( DigitalProductID and ProductID). The Office suite and any applications you installed individually will each have a registry key, identified by a GUID which resembles this value: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\xx.0\Registration Open the registry editor by pressing the Windows key + R and typing regedit in the Run dialog then press Enter.įind the following registry key (were xx = your version of Office) and locate the correct key for the application that needs a new installation key ('CD key'). How do you change the installation key without reinstalling Office?Ĭlose all Office applications that are open. If you activate it, Microsoft will think you moved it to a new computer and it can create problems later on. It happens more often than you might think: you have two Office licenses and install the wrong one on a computer.
