My VM is q35 and UEFI. It started with the 2016 best practices and I installed all the Virtio drivers and then switched to all virtio with SPICE. Before I imported I used the instructions and dism to remove all xen and xen filter drivers. Works a treat on Proxmox 6.2 with latest updates...
I also wasn't able to import my ex-XCP-ng Windows 2019 server with host type cpu. It BSODs with the same exception even just booting an install CD. If I switch to kvm64 it runs but really slowly. I have to set it to Opteron G3 to get max speed and it's pretty quick then. It's an Athlon II X4...
