Windows 10 you can disable Secure Boot. Does Not work in Win 11

Registry entry named SkuPolicyRequired inside HKLM\system\ControlSet001\Control\CI\Policy

SMode:
SkuPolicyRequired = 1

Remove S Mode:
SkuPolicyRequired = 0


(I also set the key to read only to prevent it returning)

You can't use CMD whilst in Windows in such a mode, and I didn't have a bootable USB on hand either to Shift+F10 CMD during install. 


Powershell and command line are disabled in S mode, you can boot into Safe Mode with command prompt to do commands in there.
Advanced Startup Options
Safe Mode with Command Prompt
OR
Disable Driver Signing


https://www.reddit.com/r/Windows10/comments/fnon0c/windows_10_s_mode_no_more/()
https://forums.mydigitallife.net/threads/windows-10-s-to-home-without-an-m-account.83409/