If you cannot open the applications, you can trigger the activation menu via your operating system: Open the Windows . Click on Programs , then select Programs and Features . Scroll down the list and locate Microsoft Office 2010 . Click on it and select Change from the top menu bar.
If you cannot open your Office apps or the "Change Product Key" button is missing, you can enter the key using the Windows setup wizard: Close all open Microsoft Office applications.
If you have a trial version, a different version of Office, or need to replace an existing key, you can change it after installation:
