Windows 8 Qcow2 -

qemu-img convert -O qcow2 -c windows8.qcow2 windows8_compressed.qcow2 Use code with caution.

qemu-img create -f qcow2 win81.img 40G

Download the official stable VirtIO driver ISO from the Fedora Project repository. windows 8 qcow2

On Ubuntu/Debian-based systems, install the hypervisor utilities using the following command: qemu-img convert -O qcow2 -c windows8