[WaseemAlkurdi]

Originally Posted by e-book-boy

EDIT: I found out it was secure boot. I'm currently on moms computer so i don't wanna disable and mess something up if you can provide a way to Go into Kubrick and unbrick my kindle it would be great thanks

You won't mess up anything by disabling Secure Boot. At all.
Secure Boot is like a cop who stands at the "door" to your PC. In its factory configuration, it only lets Windows (and a couple of well-known Linux "distros) start up, but not, say, viruses that start before Windows does.
Disabling it tells Secure Boot to just allow anything to pass through, until you re-enable it.
There is a method that allows us to add Kubrick's loader to Secure Boot's "good side", but it's a headache, especially for something you're only going to use once, so just disable it. You are free to re-enable it when you're done.
To disable it, go to your computer's firmware/UEFI options (sometimes incorrectly called "BIOS configuration"). You can see how to do that by Googling your computer's model name + "disable secure boot".