Windows 10qcow2 -

qemu-img create -f qcow2 -o preallocation=metadata windows10.qcow2 60G Use code with caution. 2. Configure Host Caching

If you want a fresh install, you can convert an ISO file to a QCOW2 file. qemu-img create -f qcow2 windows10.qcow2 100G Use code with caution. windows 10qcow2