Using qemu

$ qemu-system-x86_64 -enable-kvm -cpu host -smp 6 -m 8G -hdd hdd.qcow2 -cdrom reactos-bootcd-0.4.17-dev-742-gf29960d-x64-msvc-win-dbg.iso

i also tried with -cpu qemu instead of host and -m pc but it's all the same