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!!