VirtualBox does natively support QCOW2. However, you can convert the image to VDI or VMDK using qemu-img convert , then import it into VirtualBox. Alternatively, you can use the VBoxManage tool to convert VDI files, but the QCOW2 format itself is not directly usable.
qemu-img convert -f vmdk -O qcow2 Win10_Dev.vmdk windows10.qcow2 Use code with caution. Deploying Your Windows 10 .qcow2 Image Windows 10.qcow2 Download