I used your free Etcher Utility (Thanks!) to create a bootable USB drive so I could test out a Linux OS. When I used the UEFI restart utility, I got the error message shown in the title of my post. This appears to be a Secure Boot problem but I am leery of disabling the Secure Boot option in my BIOS. Is this a problem with the image I created or is it a MS Windows problem?
What do you recommend I try?
Thanks in advance for your help!