If your QCOW2 file is on your Proxmox storage, attach it to your newly created VM (e.g., VM ID 101) using this CLI command:

Alex discovers that Microsoft actually provides official virtual machines for developers. While they are primarily distributed as (for VirtualBox/VMware) or

Once you have your QCOW2 file, the install isn't quite done. To make Windows 11 run smoothly on KVM/QEMU, you need to tweak the XML or settings: