Directx-11-1-download-windows-7-64-bit-32-bit

DirectX 11.1 was originally designed as a native feature for Windows 8. To bring its benefits to Windows 7 (both 64-bit and 32-bit), Microsoft released the Platform Update for Windows 7 SP1. KB2670838

If you are looking for the official installer files, you should avoid third-party "DirectX 11.1" download sites, as these often bundle malware. The only official path is through Microsoft: The most reliable method for home users. directx-11-1-download-windows-7-64-bit-32-bit

Look at the line under the System tab. Even with the update, Windows 7 may still report "DirectX 11," but the underlying libraries for 11.1 features (like d3d11_1.h ) will be present for developers to use. Where to Download DirectX 11