Deactivating the internal GU is not thaaat good idea^^ And deactivating in the BIOS not at all^^ Remember, that this card is your VGA-Graphics in case your nVidia Display Driver goes anarchy.. then your display will be black^^
But I can't think of any reason why nVidia control panel would not allow a specific process to run with the nVidia GU.. could you please upload a screenshot from your nVidia control panel settings?
But I can't think of any reason why nVidia control panel would not allow a specific process to run with the nVidia GU.. could you please upload a screenshot from your nVidia control panel settings?