Not all Gnu/Linux Distros support Secure Boot.
This guide is to show how to disable Secure Boot from
inside Windows 10.
You Have to Log-in as Administrator in Windows 10.
Next Video:
How to Dual Boot in UEFI - Boot in UEFI Mode From Inside Windows 10.
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https://www.youtube.com/watch?v=EsxaUg4hByI