I believe you are running Windows Vista if I am not mistaken. You need to download and install the following components:
Service Pack 2 for Windows Vista
Platform Update for Windows Vista
The above two can be done by running Microsoft Update.
You also need this (DO THE ABOVE TWO FIRST THOUGH!)Link
Also ensure that your graphics card is capable of running version 10 and 11. DirectX 10 and 11 can be installed on any Windows machine (Vista comes with 10 by default) but if you don't have the hardware for it, you'll always fallback on version 9.
[Edited by Neo7, 1/15/2012 10:00:33 PM]