GPU passthrough - Windows VM doesn't boot correctly

Hi I need help with getting GeForce GPU Passthrough for Windows Virtual Machine working.
My Windows Virtual machine is a Windows 10 64bit OS.

When I passthrough my NVIDIA graphics card using GPU passthrough onto my VM, and then try to download the latest graphics drivers (GeForce Game Ready Driver Version 472.12) using Geforce Experience, my VM crashes and gives me a black screen.
Before downloading the latest graphics drivers, when I passthrough my NVIDIA graphics card using GPU passthrough onto my VM, I get error code 43:

I see that recently nvidia supports gpu passthrough and was wondering if you can assist me with this: GeForce GPU Passthrough for Windows Virtual Machine (Beta) | NVIDIA

Hi…

I’m using the version 471.68 and it works with xen 4.15.1…

Greetz