qemu-img convert -O qcow2 -c original.qcow2 compressed.qcow2 6. Conversion from Other Formats
: Windows 8 was designed during the early era of virtualization optimization. In a QCOW2 format, it often performs better than older versions like Windows 7 because it includes more modern kernel optimizations for virtualized environments.
: If you use the VirtIO drivers (standard for KVM/QEMU), Windows 8 is remarkably stable as a guest OS.