I am new to Linux and heard about Fedora Silverblue. So I installed it on an old laptop in order to try it but decided it is not really for me. I tried to install another Linux distro using an ISO on a USB stick, but every time I choose to boot the system from it, I get this “Security Boot Fail” m…

So you can get into your BIOS? And secure boot is turned off? And when you boot from a USB you get ’ secure boot fail’?

This is the problem. The BIOS is the first place I went to. I tried to turn off the secure boot, but it will not allow me to do so. I even tried to reset the BIOS setting to factory, but it hasn’t changed a thing. Prior to installing silverblue I had no problems. Now I can’t do a thing. One th…

I don’t use Silverblue so I can’t comment on that version of Fedora. What I can say is that Fedora or any Linux distro cannot alter your BIOS. Can you post some photos of your boot options and BIOS options? Its hard to understand why booting into a USB is not possible.

[IMG_20260205_000948201] [IMG_20260205_001023153]

Fedora Silverblue does not have the ability to change the BIOS settings on the computer. The following may be relevant: [image] Merely booting Fedora 42 Live media adds a "Fedora" entry to the UEFI boot menu Common Issues Problem As the Fedora Linux 42 release…

i have followed the instructions on the link you sent me and although the 2nd fedora has disappeared, I still cannot boot from a USB ISO for another distro. Prior to installing Silverblue I had no problems booting other distro. Now, every time I try I get this “Security Boot Fail” message. Sorry but…

Thanks for those photos above. Can you select the USB option as boot priority one, and take a photo of the error message?

I can’t understand how Silverblue affected your BIOS. It is technically impossible. Can you format your hard drive in another computer?

[image] Joseph Andre: I still cannot boot from a USB ISO for another distro. Prior to installing Silverblue I had no problems booting other distro. What distros did you use on this machine before Silverblue? Which distro are you trying to boot now? What model is your laptop?

Surely I must be missing something. No 1 you can do.. Turn off computer, plug in USB drive with new OS. Turn on and go straight into bios, move USB up to the top line (in your picture from position 3 to position 1. Save and restart. That will get you onto your USB drive on boot-up. But, there also…

Security Boot Fail

Ask Fedora

hricky (Hristo Marinov) February 5, 2026, 9:48am 8

Fedora Silverblue does not have the ability to change the BIOS settings on the computer. The following may be relevant:

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Security Boot Fail

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