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When we refer to Windows 10.qcow2 , we are discussing the virtual hard disk that holds the Windows 10 operating system, ready to be booted by a QEMU/KVM hypervisor. Windows 10.qcow2
qemu-system-x86_64 \ -accel kvm \ -cpu host \ -smp 4 \ -m 4096 \ -drive file=Windows\ 10.qcow2,format=qcow2 \ -cdrom Win10_22H2_English.iso \ -boot d : When we refer to Windows 10
By default, QEMU uses generic hardware which can be slow. For the best performance: Windows 10.qcow2