The model for the interface between operating systems and firmware is called the Unified Extensible Firmware Interface (UEFI or EFI for short). It offers a standard setting for launching pre-boot programs and booting an operating system.
It differs from the “MBR boot code” approach that older BIOS systems used. For a comparison of their differences and the UEFI boot process, see the Arch boot process. See Arch boot process#Boot loader to configure UEFI boot loaders.
Every application, whether an OS loader or a utility (e.g. g. It should be an EFI application that matches the UEFI firmware bitness/architecture, such as a memory testing or recovery tool.
Most UEFI firmwares use x86_64 UEFI firmware, including recent Apple Macs. Older Apple Mac computers from before 2008, Intel Atom System-on-Chip computers as of 2 November 2013[1], and some older Intel server boards that are known to run on Intel EFI are the only known devices that use IA32 (32-bit) UEFI. 10 firmware.
The ability to run 32-bit EFI applications is not supported by an x86_64 UEFI firmware (unlike x86_64 Linux and Windows versions, which do). Because of this, the EFI application needs to be built for that particular firmware processor bitness/architecture.
How to Add EFI Executable as the Default Boot Entry in BIOS | Fix Windows 10 UEFI Boot Problem
0
Sorted by:
Thanks for contributing an answer to Super User!
To learn more, see our tips on writing great answers. Draft saved Draft discarded.
Your tablet may boot into the EFI shell rather than Windows after you have finished downloading and installing a Windows update. Random occurrences of this issue are also possible, but installing the Microsoft Windows 1709 Fall Creator Update and changing the boot order are the two most common causes.
Cookies are used on this website to personalize user experience and remarketing audiences. You automatically consent to our use of these cookies if you continue to use our site.
The following screenshot shows the tablet booting into the EFI shell when the device is turned on:
Testing UEFI in systems without native support
The OVMF project by TianoCore enables UEFI support for virtual machines. A sample UEFI firmware and a separate non-volatile variable store for QEMU are both included in OVMF.
You can install from the extra repository.
It is advised to make a local copy of the non-volatile variable store for your virtual machine:
To use this variable store and the OVMF firmware, add the following to your QEMU command:
For example:
FAQ
What does launch EFI Shell from filesystem device mean?
The EFI Shell is a “shell” (imagine a command prompt) that a (U)EFI “BIOS” can directly boot into (instead of your OS), allowing control and scripting of many things including booting scenarios. Installing an EFI shell in an “EFI System” partition (type EF00) that is formatted with a vfat file system and properly named – “EFI System” – allows you to control and script many things including booting scenarios.
How do I get past the EFI shell?
Option 1: move to [Save&Exit] or press Fn + F3 to reset default settings, then save and exit (by pressing Fn + F4 to do so). Option 2: Select Hard Disk: Windows Boot Manager under [Boot-options] for Boot Option #1, then save and exit (by pressing Fn + F4 or navigating to [Save&Exit] to do so).
How do I get the EFI shell off my laptop?
- Turn on the PC of the milling machine.
- You can decide to access the BIOS while the computer is booting.
- You should see the BIOS of your PC.
- Chose „Boot options„
- Look for an option called „UEFI„. …
- Save your changes and reboot the PC.
What is EFI internal shell?
The EFI Shell is a console interface used to run simple scripts, load EFI protocols, and launch programs like the Red Hat Linux installation program. It resembles a DOS console and can only access FAT16-formatted media.
