If you fail to enable nested virtualization or the Enable Nested VT-x/AMD-V option is grayed out in VirtualBox, here is how you fix the problem in Windows 11/10 PC ...

If Virtualization keeps turning off when your system reboots, you need first to check if VT-d, or VT-x is enabled on your BIOS. If they are not enabled, do it and then turn on Virtualization. If doing ...