For the better part of a decade, "disable Secure Boot" has been a skeleton key of PC troubleshooting. You'll find the advice in Linux installation threads, guides for ...
I only know that secure boot is a feature that checks the system bootloader is properly signed by something/somebody authorized to do so. So it would make sense that ...
Do you see Event ID 1796 in your Windows 11/10/Server logs? If the Secure update process cannot complete and fails with an error message— The Secure Boot update ...