GPU passthrough guide for Windows XP VMs

In this video, we will get a Windows XP VM with GPU passthrough running under Ubuntu 20.04. This guide should work with most other Linux distributions.
Only works on machines without Intel integrated graphics.

GTX 980 Windows XP driver:
http://us.download.nvidia.com/Windows/344.11/344.11-desktop-winxp-32bit-english.exe

Win XP service pack 3:
Sources:
http://m.majorgeeks.com/files/details/microsoft_windows_xp_service_pack_3.html

.Net 3.5:
https://www.microsoft.com/en-ph/download/details.aspx?id=21

Modifying virsh (Alex Williamson’s blog):
http://vfio.blogspot.com/2016/09/passing-qemu-command-line-options.html

Error 43 (Arch Linux Wiki):
https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Video_card_driver_virtualisation_detection

USB card used in this video:
https://www.youtube.com/watch?v=_Osx0K-4w1g