I am running Proxmox VE 7.3-4. When I try to install Windows server 2019 it is unable to detect. I had downloaded the virtio ISO from the official proxmox guide to install windows vm. It directed me to the official Redhat website to download the ISO. When it is time to do the initial configuration the system detects virtio but doesn't do anything. I tested creating a windows vm on another proxmox VE server version 7.2-11. Which worked fine for the installation of a windows vm.