The Enable EFI option in VirtualBox lets you turn on EFI on your virtual machine. If you want to use Linux distributions or Windows 11 on VirtualBox virtual machine, you must enable EFI.

Nested Virtualization allows users in organizations that have deployed Windows 365 Enterprise to create virtual instances on their Cloud PC as they would on their local device.

If you need to use virtualization on Windows 11, you have to enable the feature manually, and here's how.

Hmm. Ok, maybe I forget to enable virtualization in the BIOS. Oh, no, that's enabled all right. Hmm. To Google! I find some ways of checking to see if virtualization is enabled in Windows. Answer ...