For questions about the Secure Boot feature read and use: secure-boot

About UEFI

UEFI firmware provides several technical advantages over a traditional BIOS system:

• Ability to boot from large disks (over 2 TiB) with a GUID Partition Table, GPT.
• CPU-independent architecture
• CPU-independent drivers
• Flexible pre-OS environment, including network capability
• Modular design

_{Excerpt from Wikipedia article about UEFI}

AdamW on UEFI boot: how does that actually work, then?

Known issues

• Some computers support legacy booting, but this feature is not available on all devices and planned to be phased out.
• Some UEFI firmware implementations from computer manufacturers only support booting through \EFI\BOOT\BOOTX64.EFI from the EFI System Partition, not honoring commands to boot a certain UEFI NVRAM boot entry.

Noteable questions

• http://askubuntu.com/q/233687/40581

  • Troubleshooting the following error GRUB messages when trying to boot Windows:

    error: can't find command drivemap.
    error: invalid EFI file path
    

          ^{BIOS vs. UEFI}