Now that you have an empty Windows 10.qcow2 file (e.g., 100KB on disk), you need to boot the installer.
The biggest bottleneck for Windows VMs is often disk I/O. By default, many hypervisors emulate IDE or SATA controllers, which are slow. virtio-scsi Windows 10.qcow2
Below is a draft of the essential technical "pieces" you need to configure or manage this specific file, including a snippet and the CLI command to launch it. 1. Libvirt Configuration (XML) Now that you have an empty Windows 10