First, install the VirtualBox on windows. In order to create nested virtual machines on the VirtualBox, you need to turn on the virtualization function of the CPU.

VirtualBox enables nested VT-x/amd-v.

If you open the virtual machine, an error is reported:

Cannot enable nested VT-x/AMD-V without nested-paging and unresricted guest execution

(VERR_CPUM_INVALID_HWVIRT_CONFIG).

Result Code: E_FAIL (0x80004005).....

Refer to this article again.

The specific solutions are as follows:

1. At the command prompt, run: bcdedit /set hypervisorlaunchtype off
2. Reboot

Enter the virtual machine and execute:

egrep -o '(vmx|svm)' /proc/cpuinfo

You can see VMX, indicating OK.