After booting your Windows 11 QCOW2 install, do this immediately:
qemu-system-x86_64 \ -drive file=windows11.qcow2,if=virtio \ -enable-kvm \ -cpu host \ -smp 4 \ -m 4096 \ -netdev user,id=net0 -device virtio-net-pci,netdev=net0 \ -vga virtio \ -display spice-app \ -machine type=q35,accel=kvm \ -device intel-hda -device hda-duplex windows 11 qcow2 download best install