Age of Empires III: problem installing War Chiefs

I can't install the War Chiefs expansion pack because the "Age of Empires III was not installed for All Users or the current user. Please log in with the correct account. This setup will exit." error always pops up and I have Windows 7.

So there is a solution:

in this path:

C:\ProgramData\Microsoft\Windows\Start Menu\Programs

create some new directories:

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Microsoft Games\Age of Empires III

ProgramData is a invisible directory, write the address in the address bar, then create Microsoft Games directory, then create another directory inside called Age of Empires III.

Install War Chiefs and et-voilà!!

Today ~2000  users on ESO!! Let's play!!