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

learn more… | top users | synonyms

2
votes
1answer
638 views

Disk partitions dissapear after installing Ubuntu

I have a 2TB HDD and first installed Windows 7 in a 1.8TB partition, leaving near 200 GB of unused disk to install Ubuntu in the future. Yesterday I did that, creating 4 partitions: 512 MB ...
0
votes
1answer
82 views

wubi still said files is missing after disable UEFI

after install ubuntu with wubi and select UEFI and csm UEFI is disabled however, wubi still said files is missing do i need to install with wubi again
0
votes
2answers
2k views

Windows 8 can't load from UEFI but loads by selecting the device

just replaced my CD/DVD-ROM in my notebook with an SSD, installed Windows 8 on it but got a damn annoying problem - the computer can't boot by the UEFI, I get the error of winload.exe missing and the ...
3
votes
1answer
959 views

UEFI bootloader

Issue is that EFI systems only allow you to boot using FAT32. I have to deploy multiple images of Windows 8. My WIM image is larger than 4GB and unable to transfer to a FAT32 partition. I've been ...
0
votes
2answers
9k views

Restore Windows 8 EFI after installing Ubuntu EFI

I installed Windows 8 using EFI, and later on I installed Ubuntu using EFI as well. As I always do, I had trouble with the bootloaders. Ubuntu replaced the bootloader on the EFI, which I was very well ...
0
votes
0answers
1k views

How to boot USB stick in UEFI mode?

we recently bought a new windows 8 laptop, and we are trying to install Ubuntu to it in a dual boot configuration. I downloaded the 64 bit 12.10 iso and put it in a USB stick, both with the utility ...
0
votes
3answers
3k views

How to safely install GNU/Linux distro on a Samsung UEFI enabled laptop

I have already bricked and replaced my Samsung Chronos Series 7 NP700Z3C laptop. I have discussed it in the following question: Why does my Samsung Chronos 7 not boot anymore after installing Ubuntu? ...
7
votes
1answer
3k views

Running the same Windows both in KVM and physical

I have kind of an advanced question for you, I would like to install Windows on my hard drive (which is GPT formatted) but I would like to be also able to run it in KVM. To clarify, the same Windows ...
1
vote
1answer
557 views

My Windows has been installed in EFI mode?

I'm trying to do a dual-boot system in my new Dell Inspiron. It came with preinstalled Windows 8 and I want to install Ubuntu. The documentation says that if my Windows installation is in EFI mode ...
2
votes
2answers
1k views

Can UEFI settings brick new laptops?

See closed question - this is a less localised version of the same question. Summary: changing CMS support in BIOS after attempting dual boot Windows 8 and Ubuntu 12.10 bricked my laptop. While ...
5
votes
4answers
10k 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 ...
2
votes
1answer
2k views

Could not boot Windows 8 from grub2 nor rEFInd on UEFI-system with Archlinux

I have followed the archlinux beginner's guide thoroughly and was able to install archlinux in UEFI mode and has been able to succesfully boot from it. Everything works fine except that I am unable to ...
5
votes
6answers
71k views

How to CLEAN INSTALL Windows 7 Professional 64Bit on Dell Inspiron 15R Turbo / Special Edition laptop?

I recently bought a Dell Inspiron 15R Turbo/Special Edition with following configuration: 3rd Generation Intel® Core™ i5-3210M processor, Windows 8 Single Language, English (64bit), 8GB 2 DIMM (4GB ...
0
votes
1answer
488 views

Accessing UEFI settings on Windows 8 laptop now running Windows 7

We have bought a couple of new laptops that came with Windows 8 (Toshiba L870) but we don't use Win8 at work so have rebuilt with Win7 (with Secure Boot turned off). Does anyone know how to get into ...
11
votes
2answers
30k 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. ...
1
vote
0answers
476 views

Installing Windows 8 in UEFI mode not booting [duplicate]

Installing Windows 8 in UEFI mode using a usb is not working for me. I followed various instructions on the web on making a UEFI bootable usb, but to no avail. On my (ASUS) computer's booting menu, ...
1
vote
1answer
208 views

Changing Default Boot Target in OSX

I have a MacBook with both a Linux installation as well as OSX on it. I have GRUB2 configured to boot both successfully, but when I boot into OSX it seems to automatically alter the EFI boot ...
1
vote
1answer
4k views

Fedora 18 + Windows 8: Dual boot

I just bought a new notebook which came with Windows 8 (+UEFI) which I will use to play some games, however, I want to have Fedora (18) linux available for some stuff. I tried and failed to install ...
1
vote
0answers
14k views

Install Windows 7 64bit from USB drive in UEFI mode

I got a Lenovo Ideapad Y580 with Windows 8 and I want to install Windows 7 on it. I followed the instructions on this link to create a UEFI Windows 7 Install USB flash drive - but it does not work. I ...
2
votes
0answers
245 views

System does not work anymore after migrating to UEFI

I have recently updated my BIOS to UEFI (big mistake...). When I boot in Windows 7 x64 now, it does not recognize any USB driver (even mouse and keyboard).I tried to use Windows Repair Disc to Restore ...
3
votes
2answers
1k views

Updating BIOS on DOS

I am using a Gigabyte GA-Z68MA-D2H-B3 motherboard on my computer. I wanted to migrate from Award BIOS to UEFI. I downloaded the binary file from the Gigabyte product page, but when I tried to run, it ...
2
votes
2answers
5k views

Windows 8 changes boot order

I installed Windows 8 and Ubuntu 12.10 on a 3TB GPT disk in UEFI mode. Both can boot up OK. Both operating systems created their ntries in the UEFI boot menu, there's an "ubuntu" and a "Windows 8" ...
47
votes
1answer
10k 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 ...
1
vote
1answer
5k views

Fresh install of Windows 8 on Zenbook Prime with UEFI [duplicate]

Possible Duplicate: If USB is not listed in BIOS as a boot option, does that mean the machine can’t boot from USB? Asus UEFI/BIOS options - How to boot from DVD? I have purchased a new Asus ...
27
votes
2answers
396k 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 ...
4
votes
1answer
263 views

Can a type 1 hypervisor guest OS flash the BIOS?

Type 1 hypervisors run on bare metal, and motherboard vendors provide software that allows bios to be flashed from a running OS. Can I flash a motherboard bios from within a running guest OS if ...
0
votes
1answer
34k views

How do I install Windows 7 to boot with UEFI and Intel RST

I need to install Windows 7 x64 over the existing OS (unwanted factory issued Win8, for which I've already made restore media for) on a Dell XPS 15 (L521x). It needs to use UEFI boot and use the 128GB ...
0
votes
2answers
439 views

Windows Error Recovery loop when other disks connected (UEFI)

After installing Windows 7 on a Crucial M4 SSD, I installed the rEFInd boot manager on the Crucial's ESP. I then connected an OCZ Vertex 4 SSD (and disconnected the Crucial) and installed Xubuntu on ...
15
votes
1answer
266k 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, ...
1
vote
2answers
1k views

Can I install UEFI Windows 8 through a DVD or must it be a USB?

I've read a few articles that all say to install Windows 8 through USB to achieve UEFI. I have my laptop turned onto UEFI mode but when I switch from legacy to UEFI it doesn't recognize any options to ...
10
votes
3answers
17k 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?
24
votes
2answers
46k 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 ...
11
votes
3answers
13k 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 ...
3
votes
2answers
4k views

No discs found when trying to install Windows 8 with UEFI

I have a Vizio Notebook (CN15-A5). It came pre-installed with Windows 8 x64 and is taking advantage of UEFI out of the box. The BIOS (APTOS AMI) is in Secure Boot mode with the OS selected as "Windows ...
1
vote
1answer
185 views

What prevents me from writing a bootkit that uses a recognized UEFI key?

As far as I know, UEFI Secure Boot works this way (more or less): for certain operating systems to boot, they must be signed with a key that is checked by UEFI at every boot. If a bootkit replaces the ...
0
votes
4answers
7k views

Is it possible to downgrade an OEM Windows 8 install to Windows 7?

I recently purchased an ASUS K55A. Like all Windows 8 machines, it come with a UEFI feature called Secure Boot. This basically makes sure that the laptop won't load anything other than the Windows 8 ...
1
vote
3answers
6k views

How can I add a second hard drive to a previously configured UEFI/ACHI Windows 8 machine?

Recently purchased a new Windows 8 PC. It came with one hard drive. I want to a second hard drive to it. This second hard drive is my data hard drive from my previous computer. However, I have run ...
0
votes
1answer
3k views

Step by step guide to Windows 8 UEFI instalation?

I bought a new Samsung SSD 840 Pro and replaced my old drive in my Lenovo ThinkPad W520. I installed a fresh copy of Windows 8 on my machine. Apparently it didn't install UEFI boot; I checked the ...
1
vote
0answers
2k views

Issue adding second SATA hard drive to Inspiron 660/Win 8 Pro [closed]

I just purchased a Dell Inspiron 660 with Windows 8 Pro. I added a second hard drive to the machine. This drive contains all my data (files, music, pictures, etc.) The boot drive is plugged into ...
1
vote
1answer
804 views

Error trying to boot Mint 14 in Virtual Machine with Virtual Box

I tried installing Mint 14 in a Virtual Machine and got this message.< Note that I have another VM with Debian and it works just fine! VT-x/AMD-V hardware acceleration has been enabled, but is ...
0
votes
1answer
633 views

Multiple Bootable Images on Flash Drive UEFI mode

I am aware that there exists tools that can change the mbr of the drive so that it can boot up multiple operating systems such as the Windows XP installer, Windows 7 installer, Windows PE-based live ...
29
votes
1answer
77k 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: ...
0
votes
2answers
789 views

GRUB2 UEFI booting from LVM on RAID (with XEN)

I'm experimenting with booting root filesystem from LVM volume inside the raid (mdraid superblock 1.x) via UEFI with GRUB2. Also I'm using Xen hypervisor. From grub command line I can see my lvm ...
4
votes
3answers
7k views

Windows 8 Not Shutting Down Properly With Fast Start-Up Enabled

While Fast start-up is enabled, on turning the computer off (shutdown) the computer idles for about 5min after logging out/screen turning off. It then turns off. On returning into Windows I receive ...
0
votes
1answer
946 views

Computer won't boot. UEFI DUET

My computer won't boot. Boot-repair info gives me this info. When I try to start up the computer it gives me the error error: file '/boot/grub/i386-pc/normal.mod' not found. grub rescue> (Why it ...
1
vote
1answer
3k views

Ubuntu 12.04/12.10 can't detect windows or any other partitions(Asus z77 UEFI BIOS)

I've recently completed tinkering my new pc(motherboard ASUS z77 with UEFI BIOS) and unfortunately not everything works quite well. After installing windows 7 ultimate on a single primary partition(...
3
votes
1answer
2k views

Windows 8 Secureboot: How do you bootup from another device such as cd/dvd drive or usb flash etc.?

On PC's and laptops running an older OS, this is just a simple matter of going into the BIOS and setting the boot sequence and putting the boot cd/dvd in the drive. In many cases you can even just hit ...
1
vote
3answers
2k views

Booting CDs/USB devices after installing Windows 8

I recently installed Windows 8 on one of my four primary partitions. I had two partitions for Windows 7 (boot and os), one for the Windows System Recovery Environment and the last for Ubuntu. I was ...
10
votes
1answer
13k 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 ...
5
votes
1answer
15k views

UEFI boot options gone

I ran into some issues booting Windows after trying to make a complete backup of the disc. After searching for information about some of the error codes, I found advise to change some BIOS settings, ...