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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EFI VMware Virtual SCSI Hard Drive (0.0) … unsuccessful

I installed VMware-workstation-full-8.0.0-471780 and created a new virtual machine with OS X 10.6.6 with 4 GB RAM 1 Processor 40 GB Hard Disk (SCSI) and General: Guest Operating system: Apple ...
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105 views

Installed Ubuntu next to Windows 10 caused nothing to boot anymore

The following broke my PC. Installed Windows 10 Education x64 final release Booted Ubuntu 15.04 install disc Installed Ubuntu with option to install next to Windows Installation said it has been ...
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38 views

How do I use the UEFI shell to mount a drive as read/write?

I have a Windows 8.1 tablet that I've bricked by trying to use Minitools Partition Editor. It has some queued partitioning tasks, but when the tablet tries to boot it crashes with a ...
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551 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 ...
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412 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 ...
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922 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 ...
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383 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 ...
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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 ...
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577 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 ...
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977 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 ...
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225 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 ...
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362 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 ...
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21 views

How to Change/Remove UEFI Hard Disk Password

I am using an ASUS laptop running Windows 8 and have forgot a UEFI password. The password isn't essential to startup, for I have a user password and a master password. I know the user one, but I've ...
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37 views

Windows USB EFI boot files

I've been trying to boot up my Win7 USB stick into EFI mode as the disk I want to install it on, is GPT. I have tried to modify the installation media (including copy bootmgr.efi, bootx64.efi and ...
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34 views

boot loader(GRUB) not recognized in partition along with windows boot manager

First, I'll explain my situation Device: ASUS x205ta with 32GB eMMC (Windows 8.1+Bing installed). Lets call this /dev/mmcblk0 usb flash drive: 64GB Sandisk ultra. installed Ubuntu 14.04. Lets call ...
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35 views

bootable USB key cannot boot in legacy mode?

I used the netbootin to generate a Mint 17.1 live USB on a EFI kubuntu system. It can be boot in computer with UEFI mode. However, if I change to legacy mode, the live USB cannot boot at all. Is ...
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39 views

My bios is not showing up on bootup

My Windows 7 was crashed so I tried to to boot windows 8 from usb and in bios settings I went to advanced tab and in that I just selected (USB-name)UEFI boot and then my laptop restarted automatically ...
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45 views

Hard disk does not show any Partitions during windows installation

I have a samusung laptop 365e which ive been using for over a year now, it's been working well but it started freezing all of a sudden during it execution. it then finally refused to boot but instead, ...
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132 views

Grub rescue command line, chainloading Windows 7 installer

I currently have grub2 installed on a Baytrail tablet along with Ubuntu 14.10 (64-bit) and Windows 8.1 (32-bit). The tablet comes with 32-bit UEFI only firmware, and a 64-bit atom processor. Using ...
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25 views

Asus Access BIOS Windows 8 Instructions

For these instructions to access the BIOS from asus, when accessing the advanced startup do I need to be admin?
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36 views

UEFI multi-factor authentication on admin password?

Many UEFI vendors offer boot and Admin passwords for a local machine. For a normal cold boot or reset, I would like the UEFI system to simply pick the properly signed bootloader and proceed. Having ...
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51 views

Dell E6410 UEFI

I'm having problems with my laptop using UEFI. What happens is, I can boot a UEFI operating system only if I go into boot options and manually select it. It will not automatically boot into any UEFI ...
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34 views

Unable to enter UEFI with on boot (With F2/F12)

Symtom is somewhat like this. BIOS is broken (?) I can still enter UEFI Setup using efibootmgr -n on Linux, however press F2 according to what shown on the screen does nothing. Same for F12 (that is ...
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898 views

Windows 8.1 Re-Installation on Acer Aspire - Key Issue

On Acer Aspire V3 model, Windows 8 recovery partition could not complete a fresh installation. It kept stumbling on error; it seems corrupted though I check the disk for erros/bad sectors and did not ...
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94 views

Restore hardware entries in UEFI from Windows 8.1

After a missuse of efibootmgr under Centos 7, I have deleted every boot entries in UEFI, including USB, CD-ROM, DVD. So I couldn't boot anything. I recovered Windows with the recoverer partition, but ...
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41 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 ...
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71 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 / ...
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101 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. ...
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969 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 ...
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403 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 ...
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100 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 ...
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241 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 ...
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243 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 ...
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1k 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 ...
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364 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 ...
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893 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 ...
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510 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 ...
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108 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 ...
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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 ...
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431 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 ...
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0answers
10k 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 ...
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1k 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 ...
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488 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 ...
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12 views

UEFI Secure Boot Keys

Out of curiosity to understand Secure Boot, I explored Tianocore’s OVMF along with QEMU virtual system on Linux. I could experiment & see how Secure boot prevents unsigned efi file from running ...
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14 views

Adding a windows partition to an existing Linux GPT/UEFI drive

I have a working Linux system that boots from a GPT/UEFI drive. I would like to add a windows partition to this drive, without destroying the existing boot system in the process. Theoretically, I ...
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0answers
38 views

To which extent will bitlocker affect my boot chain

My laptop has the following setup: uefi (no secure boot) gpt ssd custom bootmanager (refind, similar to grub) leading to windows 8.1 (via windows bootloader) and a varying linux distro (via grub) ...
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0answers
31 views

Cant navigate UEFI menu on my tablet.. Accidently disabled USB

I own a no-brand Windows tablet that has only a single USB port, which I connect a keyboard that has an inbuilt USB hub where i put the USB with the image. I am running Windows 8.1 x64. Not sure on ...
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0answers
13 views

Can I delete the BIOSUPDATE partition (with ASrock z87)?

I found a partition on my secondary (!) storage drive, not the system storage drive: As you can see it is in the way of easy repartitioning. I have an ASRock Z87 Mainboard, used the update Bios via ...
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0answers
24 views

How do I replace the dump of my USB recovery media with a more simple EFI partition in this situation?

The situation is as follows: this is a new Dell Precision M3800; it comes with a Windows 8.1 pro version and a USB recovery medium; the machine uses UEFI; I immediately scratched Windows and ...
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0answers
60 views

Lenovo ideapad u410: Bios in UEFI mode failed after update

I updated the Bios (65cn99ww.exe) to laptop Lenovo Ideapad U410 (Windows 8), and after computer restarted itself: the system couldn't start, it tried to repair the system on booting, The bios shows ...