Reactivate Windows 10 After a Hardware Upgrade If you use an older version of Office, ProduKey above should be able to find it for you. To reinstall these versions, you will need the original email with the key, the original box or Certificate of Authenticity on your computer.
Office 2013 or 2016 only stores a partial key on your computer, so no tool will be able to recover the entire key. If you need to reinstall Microsoft Office, the situation is slightly more complicated.
