qemu-img create -f qcow2 win11.qcow2 64G

Execute the conversion using specific flags to enforce disk compression and cluster optimization.

Download the official Windows 11 environment zip file and extract the virtual disk (e.g., Win11Dev.vmdk or Win11Dev.vhdx ). Open your terminal on your Linux host or Proxmox node.

By maintaining thin provisioning, paravirtualized VirtIO integration, and proper UEFI machine environments, your Windows 11 QCOW2 image will deliver enterprise-grade performance across any modern Linux KVM, QEMU, or Proxmox VE implementation.

Here's a quick breakdown of the most important parameters:

Example: sudo qemu-img create -f qcow2 /var/lib/libvirt/images/win11.qcow2 80G

Would you like a quick guide on converting VHDX to QCOW2 or enabling GPU passthrough for gaming?