How to Fix “DirectX Runtime Error” in New Unreal Engine 5.4 Games

Modern games require the latest DirectX 12 Agility SDK.

1. Update Windows 11: Ensure you are on version 23H2 or higher.
2. Reinstall DirectX: Use the “DirectX Web Installer” from Microsoft.
3. Clean Drivers: Use DDU (Display Driver Uninstaller) and do a fresh install of your GPU drivers.