Microsoft Direct X is a suite of technologies developed by Microsoft to provide hardware acceleration for heavy multimedia applications such as 3D games and HD videos.
Although Direct X is included as an integral part of the Windows operating systems, if you feel the need to update it, you can update Direct X via Windows Update by applying the latest service pack or platform update – or you download and install it directly. You could use the Windows Update to update your Direct X to the latest available version.Apply the latest service pack or platform update which may be offered to your system. You can search for Direct X from the Microsoft Download Center.Windows 10, Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 will support and come installed with Direct X 11.2.If you think you are facing problems with your Direct X installation or finding it difficult in getting a game or movie to play properly on your Windows PC, you might want to run the Direct X Diagnostic Tool.
All modern Windows operating systems include Direct X by default so you shouldn't ever need to "install" Direct X as a software program, per se.However, Microsoft has been known to release updated versions of Direct X and installing the latest updates may be the fix to a Direct X problem you're having or may give performance increases in your games and graphics programs.