Fake activation tools often install background keyloggers that monitor your keystrokes, compromising your personal accounts and passwords.
To activate Microsoft Office 2013 legally, use the following Microsoft Support microsoft office 15 product key activation upd free fix
When an Office application displays an "Unlicensed Product" or "Activation Required" banner, it limits your ability to edit documents. While downloading a "free fix" or a "product key generator" from the internet is tempting, these methods carry extreme security risks. microsoft office 15 product key activation upd free fix
Microsoft actually provides a for a specific scenario: OEM activation failure. microsoft office 15 product key activation upd free fix
Can I activate microsoft office for free without product key?
If you have a key that is not being recognized, you can force the system to check its status or remove old, conflicting keys.