? Thank you.

Every Steam game does this. Every game uses a slightly different package of DirectX and .NET so it needs to install the little pieces you may be missing for that game. It doesn't do an entire install.

Steam almost always do that with new games.

And are we sure steam install the right things ?

If you already have them, then it doesn't download it. It is simply checking your computer for .NET components.

Thank you my friend. Appreciate the reply and fortunately the game is running flawlessly and detected my hardware perfectly. With specs below default game is "High" and it looks and runs beautifully.

OS: Vista 64
CPU: E8400 @3.0 Dual Core
RAM: 4gigs
GPU: Nividial 470 GTX
HD: WD Velociraptor
Sound: Creative Labs Champion X-Fi
Monitor: Samsung 245T 24" 1920 x 1200 Native
Mouse: Razor Naga
Klipsch 5.1 Surround Sound (Works perfectly !!! )

Cheers -Terrapin

http://www.rockpapershotgun.com/2011/08/03/why-steam-makes-you-install-directx-repeatedly/

First off, this is a Steam peculiarity in particular. I'm not sure how much this still happens on disc-based games.

My computer has had DirectX, .Net, etc. installed about 300 times. It actually adds up to a noticeable amount of wasted time.

Ten years ago, programmers knew how to check if something was installed before installing it again, but, like the secret of Greek Fire, this knowledge has been lost to time.

I am not 100% sure but as far as I can tell these are all just MS' packages, not custom code from game makers. They're supposed to install their code with the game, not adding to or replacing the stnadard DX stuff that MS produces.

The DX installation dir is not gigantic after 300 installs, so I'm thinking it's just the same package over and over.

Ah the lost art of checking the registry.
No doubt they hide them in hard to find obscure places like HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework
I mean, who would think of looking there...

Yes the .NET installers will check and reinstall, so why should they bother doing a 1 second registy check before wasting 10 mins of the customers time downloading and running a .NET install that they don't actually need?

Don't worry, it will not downgrade you, it will only upgrade you if needed. If you have DX-11 you will still have DX-11 when it is done,. Just run DXDIAG in the run window and you will see,