Open the start menu, and search for dxdiag, then run that. You can also do it from the cmd prompt but typing the same thing. http://search.microsoft.com/en-us/DownloadResults.aspx?q=directx DirectX 11 is supported in Windows 8 and Windows 7. In Windows Vista, DirectX 11 is only supported after installation of a "platform update" DirectX 10 is supported in Window
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