Product keys after reinstalling Mac OS

[Morozka]

Hey guys!

I have a little dilemma here. When I, let's say, reinstall or upgrade Mac OS, it wipes everything on my HD, and when I attempt to install Microsoft Office again, it doesn't allow me to as I've already used up all of my product keys due to reinstalling Mac OS.

It is solvable?
Thanks in advance

 

[Dysfunction]

Call MS. Tell them you had to format your HD and reinstall. They'll clear your keys.