Solved How can I shutdown a newly installed Windows 11 without a Microsoft Account ?

I bought a used Windows 10 laptop with an enclosure that has an exterior coloured in rose gold. The installation is encrypted with BitLocker. I was not given a BitLocker key. This unit is an HP 15dy0702ds.

I removed the SSD and installed a bigger SSD and installed Windows 11. I know a child that likes rose gold. I want to send this computer from Canada to Florida, U.S.A.. On a clean installation of Windows 11 is the Microsoft Account sign in screen as shown. As far as I know it is unavoidable. I prefer to let the child in Florida sign in. My problem is that there does not seem to be a way to shutdown Windows 11 at this point. When the unit is sent via courier, I would prefer Windows 11 be completely shutdown.

When I press the power button, the screen goes black and the power light is blinking. The user guide says the blinking power light indicates the sleep state (a power-saving state).

As in the title ... How can I shutdown a newly installed Windows 11 without a Microsoft Account ?

I believe powering the unit off while in UEFI setup would cause a shutdown. Strangely, I cannot get a prompt to access the UEFI setup. My usual means of entering UEFI setup is to power on while repeatedly hitting the ESC key. It does not go to UEFI setup and instead it shows the same Windows screen for the Microsoft Account sign in. The HP user guide says power on and hit F10 is the way to get into UEFI setup but that does not work either.

This unit does not have an easily removable battery.