
Secure boot doesn't disable installing APTs, it disables installing kernel modules.On many models, there is no way to directly disable the Secure Boot mode. Be careful to set Device as the USB drive. - Boot Windows and run all FW updates in Windows (if necessary search for FW updates) - Update FW Bios - Now the grub is no longer available at boot.

Secure Boot helps to make sure that your PC boots using only firmware that is trusted by the manufacturer. If you enabled secure boot, then click/tap on the "Install default Secure Boot keys" option. Deselect the Secure Boot check box to disable secure boot. If your Dell computer laptop comes with Windows 8 as the in-built OS, it might as well have the "Secure Boot" function enabled by default. For certain virtual machine hardware versions and operating systems, you can enable secure boot just as you can for a physical machine. I leave both untouched from their defaults (enabled) and only disabled Fast Boot in UEFI before my most recent install (Ubuntu-mate 16.

By default, many ASUS motherboards that sport UEFI BIOS have the Secure Boot mode enabled. Disable secure boot ubuntu 18 A 64-bit version of Ubuntu will not boot on a 32-bit UEFI system.
