DirectX is a collection of application programming interfaces (APIs) used in Windows for multimedia applications such as 3D games and HD videos. How to Run the DirectX Diagnostic Tool in Windows 10īefore I introduce you what DirectX Diagnostic Tool is, you should know some information about DirectX.Do you know what Directx Diagnostic Tool is? How to run the Directx Diagnostic Tool in Windows 10? If you want to learn more information about the Directx Diagnostic Tool, you can check out this post from MiniTool.