If you downloaded this file and it already contains Windows 10 (the file size is likely >10GB), you can boot it directly.
# Convert to VirtualBox (VDI) qemu-img convert -O vdi Windows\ 10.qcow2 Windows\ 10.vdi Windows 10.qcow2
Windows 10.qcow2: The Essential Guide to KVM Virtualization The file extension (QEMU Copy-On-Write version 2) represents a high-performance, flexible virtual disk format primarily used by the QEMU and KVM hypervisors. A Windows 10.qcow2 file is a pre-configured or installed virtual machine (VM) disk containing the Windows 10 operating system, optimized for rapid deployment in Linux-based virtualization environments. Why Use the QCOW2 Format for Windows 10? If you downloaded this file and it already
This command:
KVM can trick Windows 10 into thinking it is running on Microsoft's own Hyper-V hypervisor. Turn on Hyper-V features within your QEMU configuration to dramatically reduce virtualization overhead for clock cycles and memory management: hv_relaxed hv_spinlocks=0x1fff hv_vapic hv_time Troubleshooting Common Issues Windows 10 Blue Screen of Death (BSOD) On Boot Why Use the QCOW2 Format for Windows 10
$ sudo chown root:root /var/lib/libvirt/images/win10.qcow2 $ sudo chmod 644 /var/lib/libvirt/images/win10.qcow2