Did you download the DirectX runtime update, or the full package? If you did the smaller update, I would go ahead and grab the full package, which you can find here -
http://www.filehippo.com/download_directx/ - it's a large download, 95MB, because it includes all the older files and updates.
If that doesn't help, I would next update your graphics driver. You can check what graphics card you have by right clicking on the desktop, clicking screen resolution, then advanced, and under "adapter type" will be your graphics card or at least series. If you post what you have, we can give you a link to the latest drivers so you can update or reinstall them.