Booting with Secure Boot
This document describes booting
Fatdog64 from a USB flash drive on a computer with UEFI and
secure boot enabled. All Windows 8 computers onwards come with secure
boot enabled by default. Secure boot can be disabled if you like
in UEFI setup, and Windows will still boot normally.
At the time of this writing the UEFI
implementations vary a lot. Some are easy to configure, some are
not. Some only except keys that are added though the UEFI setup
menu. Some are really just broken and won't recognize the keys
that are added. Fortunately these are few and hopefully soon to
Step 1: For most systems pressing F2 when the
computer starts to boot will take you to the UEFI setup menu.
Plug in your flash drive that has Fatdog64 installed, turn on
the computer and press the F2 key to enter UEFI setup.
Go to the boot tab and move your USB drive to the top of the boot
list so that the computer will try to boot from it first. Exit
setup and save your changes. (Usually F10). On some UEFI
implementations you won't have this option, but you will have an
option to manually add a boot option. Some have both. If you need
to manually add a boot option, you'll need to browse to
/EFI/boot/bootx64.efi on the USB drive.
When the computer reboots you should see
a screen like this if it booted off the flash drive with secure
key to go to the screen, and when the next screen shows up
, press any key perform the "MOK Key Management" within the next 10 seconds
If you fail to press a key in the next ten seconds, the boot will fail and you will have to power-down your computer and try again
If you do it correctly, you will eventually see this screen. Use the arrow keys to move the selection bar and highlight "Enroll key from disk"
and then press Enter
Use the arrow keys to select the device/partition that
contains the key and press Enter
. It should be the one with
in it. The example screenshot below does not show anything with 'usb' in its name because it was
taken from an emulator, but on a real machine you should see one that has it.
Use the arrow keys to move the highlight bar to the 'keys' folder and press Enter
you don't see a 'keys' folder you probably selected the wrong
partition, press Esc
to return to the previous screen and select a
Step 5: Use the arrow keys to move the highlight bar to select 'fatdog64.cer'. This is the
Fatdog64 key. Then press Enter.
Step 6: The Next screen should look like
below. Use arrow keys to move the highlight to "Continue" and then press Enter.
On the Next screen move the highlight to "Yes" and press Enter
Then choose "Reboot" and press Enter
If everything is successful, the
computer will be reboot and you will see Fatdog boot screen after it
comes back. If it does not automatically reboot, you can just power it
off manually, or press Ctrl-Alt-Del to reboot.
: Once the keys have been installed you won't
be asked for them again. If for some reason you want to remove the
Fatdog64 key, you can delete all the added keys (MOKs) by booting to the UEFI shell from rEFInd
and type dmpstore -d MokList
Final Note 2:
Secure Boot is a fickle thing. It does not always work. For example, on a Dell 14z with a 3rd generation I5,
the boot would hang after the Grub2 boot selection. For this
laptop I disabled secure boot then followed the UEFI hard drive
install instructions. Then I re-enabled secure boot and it would
boot fine from the hard drive install.