1.Click "start" or "search" -> Enter "cmd" to find "Command Prompt" -> Right click and "run as administrator".
(The installation directory of 2010 is Office14 / 2013 is Office15 / 2016.2019.2021.2024 is Office16 )
2.Find the installation directory. If you setup with Default installation directory, then :
64 bit ver : C:\Program Files\Microsoft Office\
32 bit ver : C:\Program Files (x86)\Microsoft Office\
(EX:Office 2016 64bit, please enter the code :cd C:\Program Files\Microsoft Office\Office16)
5.Activate Office again.