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 ...

If the Windows Security app displays a yellow marker, it's time to update.

I'm assuming the issue is that some exploit in the last year has resulted in the UEFI being revoked. Can I ignore this warning, turn off secure boot, update Ubuntu, and then turn it back on? Or do I ...