For Proxmox and libvirt users, the virt-builder tool added Windows 11 templates in late October 2021. This command downloads a minimal QCOW2 directly:
To get the best result in a 2021-style QEMU environment, follow these standard steps: windows 11 qcow2 download best 2021
To get the "best" version for QEMU or KVM, follow these steps to build your own clean image: Download the Official ISO Microsoft Windows 11 Download page to get the latest multi-edition disk image. Get VirtIO Drivers For Proxmox and libvirt users, the virt-builder tool