Unreal Engine freezes a few minutes after startup

Unreal Engine freezes a few minutes after startup, and an error appears before startup.
After starting the engine, the interface starts to lag after a few minutes, and nothing can be done.
Error: The entry point to the DXGIGetDebugInterface1 was not found in the DLL dxgi.dll
I have Windows 7, FX-6300, AMD RADEON R7 260X.