https://www.microsoft.com/en-us/download/details.aspx?id=35 Search for "DirectX End-User Runtime Web Installer" if the link changes.

Introduction: What is DirectX 11? DirectX 11 is a collection of application programming interfaces (APIs) developed by Microsoft for handling tasks related to multimedia, especially game programming and video rendering on Windows. Released alongside Windows 7 in 2009, DX11 introduced groundbreaking features like tessellation (smoother geometry), multi-threaded rendering (better multi-core CPU utilization), and Compute Shaders (GPU-accelerated physics and post-processing).