Follow these instructions if the Enable Nested VT-x/AMD-V option is grayed out in VirtualBox. Enable Nested VT-x/AMD-V using CMD.

Question for the hive mind: On Win 10, if I enable VT-X, Hyper-V or WSL1/2 but any related VMs or containers are inactive, does it slow the system down? I'm asking because I only have 1 computer ...