Right. There are two aspects to DirectX, the first is the graphics card, the second is what is installed on windows.
You have directx installed on your windows, thats what its sayong and thats great. However, your graphics card does not support directx 11, so while you have the drivers for directx11 your graphics card isn't using them, therefore it wont rin gameguru which requires you to have a directx11 caomoatable card.
Primary Desktop:
i7 7700,k NV1070 8GB, 16GB 3200mhz memory, 1x 2TB Hybrid, Win10.
Secondary Desktop:
i5 4760k, NV960 2GB, 16GB 2333mhz memory, 1x 2TB Hybrid, Win10.
Laptop:
i3, Intel 4000 series graphics, 6GB memory, 1x 500gb HDD, Win8.1.