So, you probably need to download and install the latest drivers for either your graphics card or your integrated graphics, depending on which you are using.
You may also need to download and run the DDU, followed THEN by a clean install of your graphics drivers. Knowing your system specs would make it a lot easier to offer ideas or suggestions.
Oh, right. Here are the specs.
Intel i7 8700K
Strix Z360-e Motherboard
Corsair Vengeance LPX LPX 2x16GB DDR4 2400mhz
Viewsonic XG2700 4K Monitor
Samsung S27C750 1080p Monitor