How to Use the DirectX Diagnostic in Windows
 

DirectX is a collection of APIs used in Windows for multimedia and video programs, and is especially important to gamers. The DirectX Diagnostic Tool displays a wealth of information about DirectX, and also lets you perform basic diagnostic tests on the DirectX system. If you want to check what version of DirectX you’re running–or even output a file full of diagnostic information for troubleshooting–here’s how to do it.

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