direct x every time??

It doesn't install it, it just runs the setup and sees that your version is up to date and closes.

Here.

I wonder that too, even old NFS 3 checked whether you have needed version installed and asked whether you want to reinstall it.

Uhm... I'm pretty sure every game has a modified DirectX for the game.

Thanks everyone for the replies, they quite clarified the issue.

Still, this system seems pretty stupid to me. MS install and licensing systems in first place, but not much surprise there.
I'd rather have a one-off installation of ALL directx versions and sub-versions, past and present, and that would be it. Games could then pick up their version of choice:)

http://steamcleaner.tikione.fr/en/ You can use this to remove all those unneccesary installers. If you'r anything like me, you'll be surprised how much disk space they use up.

Extremely annoying with Big Picture (you can't select yes/no)