im trying to turn on windows sandbox when it says "Windows sandbox cannot be installed: Virtualizations support is disabled in the firmware"My model is:

xxxxxxxx, Machine Type Model:20FMS00E00

T460 Laptop (ThinkPad) - Type 20FM

moderator comment: serial number S/N removed to protect member from mischief  /  MTM:    20FMS00E00              (tt177)

Hello MrRich4617,

Welcome to Lenovo Community

I understand that you are trying to run Windows Sandbox on your ThinkPad T460 (20FM) however it can't be installed.
Try reloading the BIOS default settings on the laptop, be sure to save.
Ensure that the machine is up to date, install all the latest from the support site.
Once done power off the laptop for a few minutes. Press the emergency reset hole located at the bottom panel, see page 6 of the user guide.
Turn it on, retry installing Windows Sandbox.
Let me know what happens.

Regards, 
Lorenzo_Lenovo