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
0answers
53 views

Boot from CD using UEFI instead of BIOS

I have a Lenovo IdeaPad Y510P. This is my last attempt at recovering my computer, as my recovery partitions are gone and I cannot boot into my computer otherwise. I have Windows 8 x64 OEM installed. I ...
2
votes
0answers
261 views

Extract Samsung OEM recovery from laptop HDD

I have a Samsung NP540U3C with Windows 8. I recovered it to factory condition, booted and it was fine. There were 107 Windows updates so I downloaded and installed them, rebooted and then I was ...
2
votes
0answers
753 views

Dual Boot Windows (any Version) + Linux (any Distribution) with GPT/UEFI, full system encryption and shared partitions

I didn't think that my requiremetns were too special, but my search really didn't yield too many results, so I still got some quesitons unanswered. Basically I'm getting new hardware and will do a ...
2
votes
0answers
280 views

Uefi and full disk encryption with lvm on luks

I have an asus machine on which i can use old bios and new uefi. I've always used the old bios system, running a full encrypted debian with the following configuration: an unencrypted boot partition ...
2
votes
0answers
1k views

Dual boot Windows 7 on pre-installed Windows 8 laptop

I have a newer HP laptop with preinstalled Windows 8. I want to dual boot Windows 7 with it, but am unable to boot to the USB. To start with, I downloaded an .iso from Microsoft that I then copied ...
2
votes
0answers
494 views

Having problems with booting GRUB for EFI on USB stick

Whatever I do, it constantly drops me into the 'bash prompt'. Never displays a menu, nothing. I'm running GRUB on a USB stick formatted as msdos (so, FAT) and when I boot into it, GRUB simply won't ...
2
votes
0answers
850 views

Is the default Windows 8 UEFI/GPT Partition Scheme necessary?

I'm installing Windows 8 on a UEFI computer with a GPT drive array (RAID 0), and whenever I try to create a new partition the installer creates additional partions according to the default Windows 8 ...
2
votes
0answers
213 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 ...
2
votes
0answers
350 views

Windows 7 EFI Partition Deleted

I converted my Windows 7 GPT disk to dynamic, which resulted in it being unable to boot. So I used EaseUs Partition Master on my second Win 7 installation to convert the disk back to basic. Now, I ...
1
vote
0answers
28 views

Is BIOS/UEFI used after OS startup?

I know that BIOS/UEFI is used during computer startup to boot the system and check HW and that it provides abstraction over hardware Does this mean, that the OS kernel calls BIOS/UEFI layer when the ...
1
vote
0answers
45 views

Windows 7 changes my uefi default boot when it starts

I installed Windows 7 in a HP Compaq 6300. First I disabled secure boot and enabled legacy mode. Then I installed Ubuntu in other partition. Ubuntu detected some uefi partitions and let me create / ...
1
vote
0answers
36 views

UEFI shell mode with no colon key

I have a newly built PC with a UEFI-enabled motherboard and I'm having trouble getting my DVD drive to boot into UEFI mode so I opted to boot into UEFI Shell to manually start the DVD in UEFI mode. ...
1
vote
0answers
425 views

Unable to access UEFI settings on Lenovo

I have a Lenovo G580 on which I installed Windows 8 and several Linux distros which have messed with my booting. The last I used was boot-repair tool. I have an EFI partition on sda2. The Grub load ...
1
vote
0answers
263 views

Booting a GPT USB key on older BIOS laptop

I have an old HP EliteBook 8530p, which does not support booting from GPT USB (GPT HDDs are fine though). Lately I had the wish to have a fast-to-start OS for browsing, smaller web tasks, etc., so I ...
1
vote
0answers
85 views

Trying windows 7 dual boot on a windows 8 machine

I have a ThinkPad (T530) with Windows 8.1 with one HDD and this is what I have done to achieve dual boot with Windows 7 on this machine - On my main and only hard disk I created a new volume ...
1
vote
0answers
219 views

EFI not found when installing Debian 7.4 beside Windows 8.1

I am searching the whole time in some forums, but unfortunately I could not really get a solution. I have Windows 8.1 running on my computer, booting with UEFI. Now I installed Debian 7.4 (basics ...
1
vote
0answers
187 views

How can I manually partition and provision a Windows 8 USB install drive with UEFI bios and GPT scheme?

For whatever reason, I cannot get the windows 7 and windows 8 usb install tools to see my usbdrive, even though my bios can. How can I manually (from elevated command prompt) partition and provision ...
1
vote
0answers
693 views

how to disable hard drives in UEFI bios?

sometimes I need to disconnect a hard drive. I have to open my computer and unplug the sata power cable. I am wondering if its possible to disable the hard drive in UEFI bios. I am using asus p8p67 ...
1
vote
0answers
247 views

Arch Linux USB Installer Infinite Loop & How to Properly Partition a UEFI Disk Before Installing Arch Linux

I would like to install Arch Linux and am familiar with GParted and its use. However, my computer comes with Windows on it, along with an EFI system partition on /dev/sda2. This seems to be a pretty ...
1
vote
0answers
636 views

How can I boot to DOS with a UEFI BIOS? (re: updating BIOS)

I have a Supermicro X9SCM-F motherboard and I'd like to upgrade the BIOS because I'm having trouble installing Windows 8.1 (and apparently I'm on a very old BIOS). However, I can't seem to boot to ...
1
vote
0answers
464 views

Dualboot Fedora 20 + Windows 8 on separate drives

Well hello there, I have a little problem with my dualboot setup. So I decided to dualboot Windows (for gaming-puposes) and Fedora (for everything else), and I also decided to give them separate ...
1
vote
0answers
90 views

How do I find the storage capacity of the E²PROM chip on my motherboard? How much space is needed for UEFI to be implemented?

I'm looking at a solution for upgrading BIOS to UEFI on a motherboard that doesn't natively support UEFI. Another user, Rod Smith, replied to a question as to how this would be done stating: "It's ...
1
vote
0answers
1k views

Tails “clone” LiveUSB wont boot

I'll try to be as clear as possible. I did install Tails to a USB, then I cloned it over another USB and thats where the problems started. The "clone tails usb" won't start in my laptop. I did try ...
1
vote
0answers
360 views

Moving a system partition to new Hardware with Win8/UEFI, without screwing up BCD

My existing Win 8 install is historically installed on a MBR dynamic disk (that's so I can soft mirror the data partition which is on the same disk). I just bought a new motherboard/new HDD, and I ...
1
vote
0answers
7k 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 ...
1
vote
0answers
813 views

Using UEFI to access CPU features which are locked in BIOS

I have Dell Latitude E6420 with SandyBridge i5-2520M and standard issue Dell BIOS (version A15). In certain situations computer produces annoying high-pitched noise (it is not loud but it is ...
1
vote
0answers
474 views

Windows 8 and Windows 7 UEFI

I have Windows 7 x64 SP1 installed on my Asus P8Z68-V LX board through UEFI (on a GPT HDD). I wanna install Windows 8 on the partition I made for it. But I don't have a DVD or USB drive so I ...
0
votes
0answers
50 views

USB HDD disk not recognized in BIOS Boot order

I installed Ubuntu 14.10 along with Windows 8.1. Obviously I used a USB drive to install Ubuntu. I made all changes to UEFI so I could boot from USB. I could see the USB in the Boot Menu and was able ...
0
votes
0answers
30 views

Modify UEFI Windows Boot Loader

I have installed 2 systems on my ultrabook Asus UX32VD. I use Windows 8.1 x64 - on first SSD disk and Kali Linux (security distribution based on Debian) - on second SSD disk. I have fully encrypted ...
0
votes
0answers
10 views

samsung-laptop module in UEFI

After searching the internet I found no good answer to this. I know that the samsung-laptop module is automatically blacklisted when a linux installation is done in UEFI mode. This was a measure to ...
0
votes
0answers
45 views

Fedora 21 64bit DVD only recognized as BIOS not UEFI

How do I get my motherboard to recognize the UEFI option of the Fedora 21 install DVD? Per the docs, I need to boot to the UEFI option to install Fedora as UEFI. There is no separate media for UEFI ...
0
votes
0answers
15 views

'Use a device' missing a USB option

I have a preinstall of Win 8.1 Dell XPS 15 MY2014 I am working on going to a dual boot with Ubuntu as my second. I am trying to boot from the uSB while in EFI mode. I have hit the shift button ...
0
votes
0answers
18 views

How do I add a Boot Services Driver (BSD) to UEFI?

I have a UEFI system with a third-party PCIe SAS adapter. I also have the UEFI Boot Services Driver (BSD) for the third-party PCIe SAS adapter (EBC, platform agnostic). How do I add the Boot ...
0
votes
0answers
24 views

What is the difference between boot manager and boot loader in windows ? Can you have multiple hard drives with different boot manager?

What is the difference between boot manager and boot loader in windows ? Can you have multiple hard drives in a computer with each drive with a different boot manager ? I recently put multiple hard ...
0
votes
0answers
33 views

Does each hard drive need EFI\ESP, MSR system partition if you want to install operating system(s) on each drive?

Suppose, there are at least 5 hard drives: drive1, drive2, drive3, drive4, drive5, .... We want to use first 3 drives to install 5 operating system: windows 8.1, windows 7, windows vista, windows xp, ...
0
votes
0answers
24 views

Reinstall Windows 8 efi boot partition

While installing Linux for a dual boot system, I messed up and mistakenly formatted the efi boot partition as plain FAT so that everything on it now is lost. How do I recover from this? I already ...
0
votes
0answers
157 views

“bootloop of death” in a samsung Phoenix securecore tiano (USB and Uefi and Bootscreen and Setup screen are off!)

Technically it is "almost" a bootloop, since I can boot ubuntu on the hard drive, and I could boot from the DVD (breaking ubuntu grub on the hard drive or trying to chainload to the dvd). Still, it ...
0
votes
0answers
24 views

Disabling PCIE_ASPM using UEFI without GRUB

I'm encountering issues with my wireless adapter (Intel AC7260) while running ElementaryOS Freya Beta 1. I've read that setting pcie_aspm=off has helped others before, and I would like to try this, ...
0
votes
0answers
37 views

Boot menu in Asus efi bios utility shows old boot entries

So I decided to reformat my computer today and I formatted my harddisk but when I went back into the bios/efi I found that it had entries to "Windows Boot Manager", "Linux Mint" and "grub". Even when ...
0
votes
0answers
25 views

Only one of my GPT drives is recognized by the BIOS

I have two GPT drives, an SSD and an HDD. My SSD has windows installed, my other HDD does not. My problem is that my BIOS only shows the SSD in boot options, and ignores the HDD. When the SSD is ...
0
votes
0answers
33 views

Why does UEFI BIOS only identify a 2TB drive on a 25TB virtual drive?

I configure a RAID6 using 16 2TB disks, and finally get a 25TB virtual drive as shown in LSI MegaRAID BIOS. And then I boot via a USB stick and try to install 64bit Ubuntu 14.04 on it. At the ...
0
votes
0answers
47 views

How can I fix GRUB on this dual disk setup?

I am dual-booting Windows and Ubuntu. The machine has two hard disks, both OSs are installed on sda (an SSD), but sda's bootloader uses UEFI and goes to Windows, whereas sdb has GRUB and boots to ...
0
votes
0answers
57 views

Can restore Windows system image because of bios/efi issue

I have an "EFI" image of a windows 7 drive. The machine that it came off of uses linux now, but I have another machine, both Dell laptops, that can use this image. Both machines have UEFI, and I have ...
0
votes
0answers
74 views

UEFI Boot Loader With BIOS Boot loader on same HDD

When we install an operating system on a PC, it either installs it as UEFI or in the BIOS mode. So, When Installed using UEFI, the OS install makes some additional 200-600 MB partitions(FAT32), Which ...
0
votes
0answers
46 views

Fixing a broken UEFI boot loader?

So recently I got a new SSD, and was moving my Linux boot partition to the new disk. All went well, there wasn't any problems and the OS booted successfully. My problem is that I then went to cleanup ...
0
votes
0answers
32 views

How to password protect USB UEFI boot on 8.1 w Secure Boot Disabled when Boot Order is USB-DVD-HD

I had to reverse my boot order to install dualboot Ubuntu 14.04 and have Secure Boot disabled. After the install I can (only) boot linux with rEFInd on DVD - which is fine for now. It will take a ...
0
votes
0answers
54 views

BIOS does not shows up Windows 8 EFI after Ubuntu install & incorrect partitioned size

I had window 8.1 preinstalled on my laptop. Recently I also installed Ubuntu alongside to have dual boot. But anyhow after install i.e. restart or due to some alteration; I can not see choices to boot ...
0
votes
0answers
39 views

how to properly set up grub2 with uefi on gpt

I've recently installed fedora on new ssd disk. Info: GPT, uefi partitions: (lsblk) NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
0
votes
0answers
22 views

Boot order changed after pulling harddrive out to install Win 10 Tech Preview to different harddrive

Ok, so to install the Windows tech preview to my other harddrive I decided to pull my current one out, install Win TP to a spare 250 gig, and after it finished I put my original harddrive back in. ...
0
votes
0answers
255 views

Dell Vostro 5470 - unable to install Windows 8

Has anyone experienced issues with installation of Windows 8 with Dell Vostro 5470? I bought it today, it came preinstalled with Ubuntu 12.04. The issue, as I understand and was able to Google out, ...