UE4 crash on startup

Trying to install Unreal but, once installed, when I launch the editor, I get an immediate crash. Tried 4.16.1 initially, then tried reinstalling but got same issue. Now 4.15.3 is giving the same issue. Trying 4.0.2 now. This is the only error in the log

[2017.06.18-08.32.52:151][ 0]LogD3D11RHI:Error: Direct3DDevice->CreateTexture2D(TextureDesc,SubResourceData,OutTexture2D) failed
at D:\Build++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Texture.cpp:441
with error E_INVALIDARG,
Size=512x512x1 Format=DXGI_FORMAT_B8G8R8A8_TYPELESS(0x0000005A), NumMips=1, Flags=D3D11_BIND_RENDER_TARGET D3D11_BIND_SHADER_RESOURCE

Any ideas?

Thanks
Adam