Windows 7 does not natively support the high-performance VirtIO drivers used by KVM. Windows 7.qcow2 - Google Groups
qemu-img convert -f vmdk -O qcow2 source.vmdk win7.qcow2 windows 7 qcow2 file
Windows 7 does not natively support the high-speed VirtIO storage and network controllers used by KVM. Download the "virtio-win" ISO from the Fedora project to provide these drivers during installation. 3. Launch the Installation Windows 7 does not natively support the high-performance
Windows 7’s heavy writes to registry and event logs can cause rapid snapshot growth. Best practices: windows 7 qcow2 file