What version of Windows does Fallout 3 run on?

Gamers love playing Fallout 3 to this day, which is why Fallout 3 has graced the screens of computers running on not only Windows 7 but Windows 8, 8.1 and even 10 as well. However, as timeless a classic as Fallout 3 is, the fact of the matter is that it was designed to run on old, clunky computers.