All new Windows PCs have DirectX files already installed by default so new installations are rarely needed unless you are using Windows Vista or Windows XP.
But Microsoft frequently releases updated versions of DirectX and installing the latest version may be the fix to a DirectX problem you’re having or may give performance increases in your games and graphics programs.
Checking the DirectX Version in Windows: You can check the version of DirectX and files installed with it. In the Run dialog box, type dxdiag. DirectX Diagnostic tool will be opened. The dialog box displays program information, including the version number.
Follow these easy steps below to update to the latest DirectX in Windows.