Serial Key Mountain & Blade How To Get The Serial Key For The Genuine MS Office After Formatting The PC?

How to get the Serial Key for the genuine MS Office after formatting the PC? - serial key mountain & blade

I had a real MS Office on my PC, that the format is because of a problem now, I have nothing that I can be the serial number of my original manuscript Office. I have the installation files, but not to activate the button. Can anyone help?