Windows 10.qcow2 //free\\

: If you need more space, you can increase the size of your .qcow2 image:

For a single Windows 10.qcow2 on an NVMe/SSD, set cache to unsafe or writeback in your libvirt domain XML: Windows 10.qcow2

-cdrom virtio-win-0.1.240.iso

You must download the official installation media directly from the Microsoft Windows 10 Download Page 3. Install via QEMU To boot the "piece" and install the OS, run: qemu-system-x86_64 -m : If you need more space, you can increase the size of your