![]() My rEFInd Secure Boot documentation covers this process in detail for rEFInd. To be useful, you'll need to install these programs to launch from PreLoader.efi or shim.efi. Update: Recent versions of rEFInd, and I believe also gummiboot, provide an option to reboot into the firmware setup utility. For more information or if you want to use shim rather than PreLoader, see my Web page on the topic for details. You'll still have to configure the boot loader to boot off your regular hard disk, though. When you boot, HashTool will then let you register that program as valid, and thereafter it will work. If you use PreLoader, you can begin as just described, but you'll also need to copy a regular Linux boot loader to the USB drive as EFI/BOOT/loader.efi. This would enable you to boot to Linux and install the Secure Boot-enabled boot loader on your hard disk. With any luck, HashTool will come up and give you an option to reboot into the firmware setup utility.Īnother option would be to prepare a USB flash drive or the like with a Secure Boot-enabled boot loader (PreLoader or shim). So, I have a Dell laptop with Windows 10 installed on it. I will be happy to answer any question you ask to get the clear picture. I found a solution on the web which guided me to add a custom boot option by going into the bios and selecting the add a efi file as trusted secure boot option or something like that and i added the grub file of phoenix os and I can now boot with it but now I want to. Move the USB flash drive to your currently-unbootable computer and try to boot from it. 1 Hello there, First of sorry if the question is not very clear. I installed phoenix OS into my acer aspire E1- 510 but even after disabling secure boot it was always booting to windows.Copy and rename PreLoader.efi to the USB flash drive as EFI/BOOT/boot圆4.efi and copy HashTool.efi as EFI/BOOT/HashTool.efi.You may need to partition it with GPT and mark the partition as an ESP by giving it a type code of EF00 in gdisk or by setting its "boot flag" in parted or GParted. Prepare a USB flash drive with a FAT filesystem.Download PreLoader.efi and HashTool.efi.If yours is one on which this feature works, you could get in by preparing a USB flash drive as follows: This option doesn't work on all computers, though. IIRC, the HashTool.efi program that comes with PreLoader.efi provides an option to reboot into the firmware's setup utility. If you've got such a system, you could try unplugging the hard disk from the motherboard and booting without a disk that might kick the system into the firmware setup utility. Some BIOS let you use the Enter for changing an option, but in most case you have to use the functions keys (Fx) in order to change it. ![]() Some computers don't enable the keyboard, though, or don't provide this option at all. With most computers, you can enter the firmware setup utility by hitting a function key, or sometimes Del, early in the boot process. By design, Secure Boot cannot be disabled from within an OS you must enter your firmware's setup utility in order to disable it. ![]()
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