The Unified Extensible Firmware Interface BIOS (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI is a replacement for the older BIOS firmware interface present in all IBM PC-compatible personal computers

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How can I repair the Windows 8 EFI Bootloader?

I installed Windows 7 and Windows 8 in EFI mode on a hard disk some days ago. Today, the bootloader got missing/corrupted. I currently have the Windows 8 installer on a flash drive and tried using ...
45
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1answer
6k views

If I buy a computer with Windows 8 and Secure Boot, will I still be able to install Linux?

I've heard a lot about how Microsoft is implementing UEFI Secure Boot in Windows 8. Apparently it prevents "unauthorized" bootloaders from running on the computer, to prevent malware. There's a ...
25
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4answers
75k views

How to reinstall GRUB2 EFI?

After successfully updating my bios, something went wrong and I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a SATA: ...
25
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2answers
109k views

What is the difference in “Boot with BIOS” and “Boot with UEFI”

Now Windows 8 supports the UEFI bootloader and I have read that its different from the BIOS, but it's unclear to me after many searches on the Google. Some points in mind are below As we all know, ...
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2answers
26k views

Make UEFI, GPT, Bootloader, SSD, USB, Linux and Windows work together

I like to use the latest hardware and the latest software; thus I have a Laptop (Lenovo X220) with UEFI instead of BIOS an SSD instead of an HDD GPT partitioning scheme instead of MBR USB to boot ...
21
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2answers
227k views

Asus UEFI/BIOS options - How to boot from DVD?

I just bought a new PC and the default installed OS is Windows 8. I want to install Windows 7 but when I go into the boot options screen I only have one option: Windows Boot Manager I can't find my ...
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2answers
21k views

EFI Partition vs /boot partition

I have just sat down to install debian 7, which contains something called 'EFI' which is entirely new to me. I went through the install as I usually do; 256MB /boot partition, bootable, unencrypted ...
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5answers
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Is there any way to boot Windows 7/8 using BIOS on GPT?

I'd like to know if there's a method to get Windows 7 or Windows 8 Developer Preview to install to a GPT disk on my traditional IBM PC BIOS setup. Windows 7, of course, rejects my GPT partition, ...
14
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1answer
2k views

What hardware device used to eat up 1.4GB of my 4GB RAM, and now suddenly after no hardware changes eats up 2.2GB?

This is more or less a continuation of What hardware device eats up 1.4GB of my 4GB RAM? While I have more or less accepted the solution there that for some mysterious reason, after a BIOS upgrade ...
13
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5answers
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How to know if my BIOS supports UEFI?

I recently bought a new Dell notebook for my girlfriend and I want to know if the computer comes with a UEFI BIOS, unfortunately I didnt find any information in the manual or on Windows, is there some ...
13
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2answers
12k views

Windows 8 + Linux Dual Boot under UEFI BIOS

My intent in a very near future is to set up a dual boot system with Windows 8 and Debian Linux (for testing purposes) on a Lenovo Ideapad 205, that has UEFI BIOS. I saw several articles about the ...
12
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1answer
143k views

How do I boot my Samsung laptop from a CD/DVD?

I have a Samsung Series 3 laptop and want to boot from an Ubuntu Live CD. When I press F10 to pull up the BIOS/boot configuration, I don't get an option to boot from the CD. Similarly, in the BIOS, ...
12
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4answers
10k views

Hiren's Boot CD with UEFI support?

I am a long term user of Hiren's Boot CD, but the CD does not support booting on UEFI/EFI/SecureBoot hardware, is there some kind of update/patch to apply to the cd image to be able to boot without ...
10
votes
3answers
42k views

How to tell if windows 7 installer boot in EFI or BIOS?

I have a windows 7 64bit installation USB. I want to know if the windows 7 installer has booted into EFI or BIOS mode. I googled and found a solution here ...
10
votes
1answer
12k views

Preinstalled Windows 8 and Linux UEFI dual boot on a laptop

I am trying to set up Windows 8 and Arch Linux on a new Sony Vaio E14 with preinstalled windows 8. So far: installed W8 to my new SSD (switched for the original HDD) using Recovery Media shrunk the ...
9
votes
4answers
14k views

How can I use TrueCrypt under windows 8.1?

I know that TrueCrypt doesn't support windows 8 because some systems have UEFI enabled. It seems that if UEFI is disabled or Windows 8 is installed on an non UEFI system TrueCrypt just works fine in ...
9
votes
2answers
27k views

How do you install Linux alongside Windows 8 without corrupting the Windows 8 boot configuration?

In order to install Linux Mint 14 alongside Windows 8 I disabled UEFI and booted to a flash drive with the Linux image. I installed Linux, restarted the computer, and the GRUB boot loader appeared. ...
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2answers
3k views

Do hard drives need a GUID partition table (GPT) to boot in UEFI mode?

Is EFI booting something hardware specific? I have a desktop motherboard with a UEFI Bios, but I can only boot from USB drives in "UEFI" mode. Both the DVD drive and the HDD's (a RAID 0 array) boot ...
8
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4answers
47k views

Clean install of Windows 7 Pro 64-bit on a UEFI with GPT laptop?

I’m currently pulling out hairs about a problem with my wife’s new Samsung Book 9 laptop. it comes preinstalled with Windows 8. She wants Windows 7 Pro. I’ve board a Windows 7 Pro 64-bit for her and ...
8
votes
4answers
17k views

Will my computer be able to run Windows 8 without UEFI?

Will I be able to run windows 8 on my system, even though I am not using UEFI? Is there a work around if I don't want to use UEFI?
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2answers
9k views

Tools to modify UEFI Variables in Windows/Linux?

I have a DELL machine that use Phoenix SecureCore Tiano as its UEFI/BIOS However, it is totally not configurable as its UEFI shell & menus are hidden in BIOS Setup. I'm wondering if there were ...
8
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2answers
307 views

Timeout option not working on efi windows 7/windows8 dual boot machine

I hav a gigbyte GA-Z77m-D3h mobo and installed Windows 8 Pro and Windows 7 Ultimate on two SSDs (in that order) in EFI mode. Now when I start my computer, I get the windows boot menu (text mode) with ...
8
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1answer
13k views

EFI VMware Virtual SCSI Hard Drive (0.0) … unsuccessful

I installed VMware-workstation-full-8.0.0-471780 and created new virtual machine with OS X 10.6.6 with 4GB Ram, 1 Processor, 40GB Hard Disk(SCSI) and General --> Guest Operating system : Apple Mac OS ...
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1answer
15k views

Windows detects GPT disk as MBR in EFI boot

This disk is OCZ VERTEX 128GB SSD. It is formatted as GPT from OSX. The disk layout is, /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: ...
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2answers
15k views

What are the advantages to install Windows 7 with UEFI?

I just received a Dell Precision M4600 and looking at BIOS it seems it has UEFI support but it is disabled. So due to the fact that I need to reinstall Windows 7 from scratch, do you suggest to ...
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2answers
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How would I reinstall the grub-efi bootloader on Fedora Linux?

I recently installed Fedora 18 using EFI boot. Like the other current linux distributions, it sets up GRUB2 for me. I have experience with re-installing the BIOS version of GRUB when things go ...
7
votes
2answers
704 views

What is the impact of Windows 8 with UEFI on normal users?

I am a normal man-in-the-street computer user and so do not really understand what this is about, but I want to. Can someone please explain to me if: The Windows 8/UEFI secure boot thing will make ...
7
votes
2answers
9k views

Do I need to re-install windows 8 to enable UEFI?

I know that UEFI provides for much faster boot up speeds, but as of right now it is disabled in my BIOS. Should I enable it and it'll switch over auto-magically?
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2answers
9k views

Windows 7 + Ubuntu dual boot + UEFI BIOS

I received a new Lenovo T420 laptop with Windows 7. The disk now contains: a hidden SYSTEM_DRV boot partition (1.17GB, 400MB used). I'm guessing this is the UEFI partition; the laptop comes with ...
7
votes
3answers
2k views

Windows 7 - Cloned partition onto 2nd disk (in same machine) won't boot

Notes: using a MacBook Pro 2011, UEFI and GTP. Replaced the DVD drive in my laptop with an SSD (disk 2). Installed Win7 onto the new SSD, which worked fine. Decided to clone Win7 from disk 1 onto ...
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3answers
2k views

Every windows 8 boot breaks grub

I have Windows 8 and Ubuntu 13.04 dual booting with UEFI and grub. (re-used the windows UEFI partition) After I used boot-repair, everything seemed fine. After I boot into Windows, however, I can't ...
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3answers
6k views

Is is possible to update BIOS to UEFI?

I just ran the Windows 8 Upgrade Assistant on an older machine (just for fun) and was informed that due to lack of UEFI firmware, Secure Boot would not be supported. What I want to know is, is it ...
6
votes
1answer
12k views

Windows 8 boot into UEFI firmware settings missing

On a homebrew computer I've installed a Intel DX79SR Mainboard, changed the BIOS mode to UEFI and installed Windows 8. I further switched UEFI to fast booting, which works nicely. Now I wanted to ...
6
votes
2answers
4k views

Linux on UEFI - how to reboot to the UEFI setup screen like Windows 8 can?

makeuseof.com explains that Windows 8 certified hardware has a new way to enter the UEFI setup screen (equivalent to BIOS). From How To Access The BIOS On A Windows 8 Computer: No longer do we ...
6
votes
1answer
9k views

Why would an EFI “BIOS” update break the EFI boot manager?

After successfully updating my P8H67-m pro with the latest "bios" version I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a ...
5
votes
4answers
252 views

How do I get my system to find a “buried” MBR?

Following a botched Linux install, my Windows 7 install can't find my MBR normally. It's in there -- somewhere -- and I CAN access it if I use F12 during boot to access the mobo boot options: Note ...
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2answers
3k views

UEFI: Failed to install override security policy

I run the latest Arch Linux image on ASUS Sabertooth 990FX and get this error. Failed to install override security policy. How can i fix it?
5
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2answers
636 views

How to configure dual boot NixOS with Mac OS X on an (U)EFI MacBook?

I could not find any description of configuring dual boot of NixOS and Mac OS X on an (U)EFI MacBook. I am willing to experiment, but i would like to know at least that what i will try is supposed to ...
5
votes
2answers
534 views

On warm (re)start, computer powers off instantly. After unplugged, it starts and runs ok

My computer fails to start from any power-state other than power-off: ASUS UEFI MB (F1A75-V Pro) with AMD Llano APU 12G RAM (passes memtest) 3x HDD Thermaltake semi-passive PSU Cold start works ...
5
votes
4answers
8k views

Which linux distributions offer seamless support for UEFI and an LVM root out of the box?

My new ultrabook (an Asus UX32VD) requires UEFI in order to boot from the internal harddisk. I use an LVM partition which contains my root fs and dual-boot Windows 8. I somehow managed to get this ...
5
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2answers
5k views

Windows (using UEFI boot on GPT disk) will no longer boot after adding an MBR hard disk

I have recently installed Windows 7 64 bit on a new SSD using UEFI boot and GPT. The system worked fine. After adding my old system HD to the system (that uses MBR), Windows will no longer boot ...
5
votes
4answers
12k views

Cannot install CentOS 6.5 using UEFI usb boot

I am trying to dual-boot CentOS 6.5 on my desktop that is currently running Windows 8.1. I have two storage devices: an SSD that has my Windows installation, and an HDD that has all of my data. Both ...
5
votes
3answers
14k views

How to create an UEFI bootable USB stick from an ISO

I have an ISO image of my backup solution's recovery cd. When I burn the image to a CD-ROM, I can boot from it in UEFI or normal mode without problems. Unfortunately, this is no solution for my ...
5
votes
2answers
868 views

Windows 8 Install Hanging at first white-font boot splash

I'm trying to install the Windows 8 preview on my Samsung Series 9 (2012, Ivy Bridge). I've done a bit of a custom scheme with this one: I'm using EFI/UEFI on this system. I've seen no indication ...
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votes
2answers
3k views

Dual Boot Installing Ubuntu 12.04 with Windows 7 (64) on a non UEFI system fails

I cannot seem to install the correct boot loader for a non-UEFI firmware system. I'm trying to install Ubuntu 12.04 and Windows 7 (64) which are technically compatible with GPT but for windows only if ...
5
votes
1answer
333 views

Triple booting on a Mac Book [almost there]; boot loader issues

Here is my current GPT/MBR partition table: Current GPT partition table: # Start LBA End LBA Type 1 40 409639 EFI System (FAT) 2 409640 663646255 Mac OS X ...
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votes
2answers
6k views

What are the disadvantages of not using UEFI boot?

I bought a Samsung series 9 laptop with 64-bit Windows 8 pre-installed and wish to install Linux (probably Ubuntu 13.04 when it comes out ext week, but also considering mint 14). Now there have been ...
4
votes
1answer
7k views

How do the 'EFI system partition' and UEFI *.efi files relate?

I read that there needs to be an EFI system partition. The EFI System partition is a partition on a data storage device that is used by machines that adhere to the Extensible Firmware ...
4
votes
3answers
4k views

Dual boot Windows 8 and Ubuntu?

I've installed Windows 8 on a machine (Lenovo X220 laptop) with Ubuntu 12.10 already installed on another disk. I am guessing that Windows 8 has convinced the laptop to switch to UEFI boot (rather ...
4
votes
2answers
10k views

How to move an existing installation of Window 7 64bit to UEFI (from legacy)

I have a laptop that has Windows 7 64 bit Enterprise edition. It is already filled with plenty of Software and drivers. The laptop (Dell E6220) supports booting through UEFI, but the insatllition was ...