Hello, Thank you for buying our game! Unreal Engine 4 games install the prerequisites in order to be able to run the game. If anything is missing you can try installing manually from \Engine\Extras\Redist\en-us folder.
What graphics card are you using?
You can run dxdiag and in the "display" tab you can check the "drivers" section and see if your graphics card supports DX11 in the "feature levels" area.
Can you try upgrading your Drivers?
Let us know how it goes!