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 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 ...
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2answers
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How to register/convert a restored linux OS (bios) to EFI booting

First let me explain my current set up. I recently scrubbed my two main drives and converted them to GUID. On the primary drive (sdb in my case) I have created an EFI boot partition (ESP) on ...
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2answers
26 views

How do I disable digital signature checking for Windows 8.1 EFI files?

I'm trying to patch my bootmgfw.efi file to change the background color of the BitLocker password prompt and other Windows bootup screens. I found the values to search for and replace for the color ...
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1answer
47 views

UEFI strange behavior - works once but deletes MBR

I have a Toshiba Satellite L50-A1-D6 with the latest (14 November 2014) BIOS update. I have removed Windows 8, completely formatted the HDD (in GPT), and installed Linux (Ubuntu, but this is not ...
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0answers
26 views

4T RAID 0 Partitioning issue

I am building a new workstation 1.2T 10K SAS X 4 for Win 7 Pro SP1 x64 I must use RAID 0 for this workstation. What I would like to have is C = 500G D = rest of spaces So BOIS based system with ...
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26 views

Windows UEFI repair

I have an Acer Aspire 571-series laptop that came with Windows 8 preinstalled (now upgraded to 8.1). Last week I installed the OS X Yosemite (hackintosh) to triple boot with Windows and Ubuntu, and ...
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0answers
58 views

Flash 64-Bit UEFI on Intel Baytrail Tablet

Is it possible to flash a 64-bit UEFI on an Intel BayTrail Tablet which currently has a 32-Bit UEFI? I tried to install a 64-Bit Ubuntu 14.04 (which surprisingly worked) but after the installation my ...
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3answers
69 views

Disable Secure Boot to install Windows 8.1 in UEFI mod via USB stick [duplicate]

I'm trying to install windows 8.1 using a USB stick from UEFI Mod. I used Rufus to format the USB stick as "GPT for UEFI". The problem is that my PC can boot in UEFI mode only if I turn Secure Boot ...
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1answer
3k views

How to find out if UEFI is corrupt? If it is, how to recover it?

I installed Ubuntu 13.04 on my Win 8 Pre-loaded system as dual boot. At this point I could no longer boot Windows 8. I tried using boot-repair, but it did not work. I have basically tried everything I ...
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0answers
15 views

How do I create the Microsoft bootloader on the EFI partition? [duplicate]

I have Linux and Windows installed in a dual boot configuration. The Windows bootloader is corrupt. I want to reinstall it using the Windows recovery partition but I do not know how to boot to it ...
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2answers
790 views

How to recover Windows Boot Manager after a Mint installation gone wrong

Yesterday, my cousin wanted me to install Linux Mint onto his Windows 8 Lenovo laptop so he could dual-boot Linux Mint and Windows 8 so he could get some hands-on experience with Windows 8. I've ...
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1answer
3k views

Fedora 19 (you have not created a bootloader stage 1 target device)

I want to install fedora 19 to my HDD but I get errors: you have not created a bootloader stage 1 target device sda6 must have one of the following disklabel types: GPT. I tried: Create 1-2 mb ...
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1answer
3k views

Why can't I install Windows 8 on an UEFI machine from an MBR based USB disk?

Just tried to install Windows 8.1 on an UEFI machine/GPT disk. I used a 2 TB MBR-based USB drive to contain the installer (FAT32 partition with Windows 8.1 install files). I got as far as selecting a ...
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1answer
5k views

Windows 8.1 installation from USB after deleting Windows Boot Manager in BIOS/UEFI

I removed Windows Boot Manager option from BIOS (UEFI) with EasyUEFI, after reboot I got an error message about broken BCD, need to be recovered, I tried to reinstall Windows 8.1.1 Pro X64 from USB ...
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1answer
51 views

Unable to boot Ubuntu 14.10 on Toshiba Satellite C55D with UEFI boot mode

I am trying to get Ubuntu 14.10 to boot on my Toshiba Satellite C55D-B5212. I have UEFI boot mode and Secure Boot enabled. The Ubuntu live USB stick booted without issues and the install seemed to ...
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3answers
2k views

How to partition hard drive from MBR to GPT for Windows 8.1 UEFI install

I just bought a new HP notebook (ProBook 450 G0) and it came preinstalled with Suse 11 Enterprise. Now this is the first time I've owned a system with an (U)EFI and I don't know how things work on ...
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2answers
25k views

UEFI Legacy boot hidden - tricks to unlock it?

I bought an Acer Aspire E1-510P-4459 with Windows 8.1... And I am considering installing Linux on it; maybe Win7, but I'd need to get a USB CD for that. So I downloaded a live image of my favourite ...
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2answers
54 views

Windows 8 Tails Uefi to legacy and legacy to uefi

Recently I downloaded tails os, and want to boot it from usb stick. My pc is running in uefi mode, and I heard that it's possible that windows 8.1 won't work after changing to legacy. How can I ...
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2answers
4k views

Windows 8.1 UEFI x64 & Windows XP x64 Dual-Boot

I want to add option to boot in XP into the Win8.1 boot menu. So I have 2 drives: On the first one I have installed Windows 8.1 x64 UEFI; And on the second - Windows XP x64. Following is what I ...
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0answers
48 views

UEFI not recognizing USB 3.0 drive

I would like to run Windows To Go on an external USB 3.0 drive and whenever it is plugged into my laptop, Windows should run instead of Ubuntu 14.04. I successfully installed and configured Windows ...
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2answers
38 views

How to boot to Windows 8.1 in UEFI boot mode?

I recently installed Windows 8.1 from a USB drive. In order to boot from the USB drive, I had to disable secure boot in the BIOS and switched to Legacy boot mode (from UEFI boot mode). After the ...
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2answers
2k views

Can't install Windows 7 with UEFI off on GPT drive

I need to have a dual boot with Ubuntu and Windows 7 on my notebook with UEFI. I had to turn UEFI off to install and boot Ubuntu. Now I'm trying to install Windows 7, but it says it can't be ...
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2answers
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creating UEFI USB Boot stick using rufus option gives errors

I am trying to install windows 7 from a USB UEFI stick that I tried to create in vain. I read other posts on creating UEFI USB Boot sticks and found Rufus the most convenient option . However , Rufus ...
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2answers
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How to edit the Boot Graphics Resource Table / Edit windows 8 BOOT LOGO?

I want to edit the screen which is displayed when windows 8 (starts) loads (/loading). As for now it has the Toshiba logo, I want my custom logo or the windows default logo. I have found that UEFI ...
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2answers
70 views

Booting a BIOS bootloader from UEFI mode

I have a Linux setup that I boot in UEFI mode with GRUB. I want to try out OpenBSD, which unfortunately doesn't support GPT or UEFI yet, so I partitioned a drive with a traditional MBR table and ...
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3answers
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UEFI Boot a NTFS Drive

I'm trying to install Windows 8 through a bootable USB flash drive, in UEFI Mode. However, while it does work when the drive is formatted as FAT for some versions of Windows 8, the version I want to ...
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1answer
419 views

Install Windows 7 after Ubuntu: Cannot install because of GPT partition

I'm trying to install Windows 7 on a NTFS partition after installing Ubuntu 14.04. But it says that I'm using a GPT partition. The solution I found was to erase everything, then install Windows 7 then ...
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1answer
3k views

Create UEFI-bootable DVD with Windows 8.1 iso

I'm trying to set up a UEFI-boot of Windows 8.1. However, I seem to be unable to install it with a USB drive (previous question), and when I try to install with a DVD (the same iso), I don't get the ...
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1answer
89 views

Arch Linux UEFI bootable usb installation media

I want to install Arch Linux in UEFI mode, but I fail at booting the installation media in UEFI mode. What I have done so far is: Create msdos partition table on usb key OR create gpt partition ...
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3answers
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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 ...
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1answer
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Lenovo Windows 8 EFI restore from image

First time here. I have bought e530 with windows 8 and the first hour of work with it i have a problem. I have ssd with windows 7 which i want to use with my new e530. I have made a sysprep of win 7 ...
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271 views

How can I place /boot/efi on a different drive than / and /home?

I am trying to install Fedora 21 onto a relatively recent Toshiba laptop. Due to firmware problems, I cannot alter the existing EFI partition. Therefore, I need to install /boot/efi on external media. ...
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1answer
57 views

How to install Windows 8 without flash drive and dvd? GPT/UEFI

I have my new SSD, on which I want to install Windows 8.1. I have an iso image. So what I normally do when I use MBR on the drive: Create partitions Extract iso to one of the partitions Make that ...
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2answers
85 views

Run Linux dist from bootable USB on Surface Pro 2

I'm having issues booting from USB on my Surface Pro 2 with win 8.1 and UEFI. Tried creating bootable USB using LinuxLive and a Linux dist. Also tried creating bootable USB with Easy2Boot, and adding ...
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0answers
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Thinkpad Edge E545: Failure to load kernel through efi

Now this is an issue I've been battling for a long time ... I am trying to make a proper UEFI dualboot system, the problem is I cannot seem to load gentoo kernel either simply by using EFI stub (also ...
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1answer
59 views

rEFInd boot-manager - 'volume' as GUID?

How can I properly set a volume setting on a boot option in 'refind.conf' by using an GUID of it's partition? My current setting is but 'refind' fails telling me that the specified file was not found ...
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2answers
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replace efi firmware with old legacy bios?

So I bought a new laptop with 64-bit windows 8 pre-installed, and in preparation for downgrading to win7 32-bit, i've been reading about EFI and MBR etc.. It seems like the firmware which boots disks ...
8
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3answers
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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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1answer
22 views

How to copy/move files between filesystems using UEFI shell

How can we move files between filesystems using UEFI shell. If i try: fs0:> mv somefile fs1: I get an error that source and destination should be on the same filesystem. How can we workaround ...
0
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1answer
61 views

Windows boot manager overwrites my boot order uefi bios samsung

In the UEFI bios in my samsung ativ boot 5 laptop I have 'UEFI OS' (which is Grub2, Linux etc..), 'Windows Boot Manager'(Windows 8.1). I want to change boot order to: 1. UEFI OS 2. Windows Boot ...
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64 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 ...
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2answers
80 views

Windows 7 installation disc fails to boot properly on UEFI

Whenever I try to install Windows 7 onto my laptop, the boot process simply stops and hangs at the boot splash. No error is given, and the splash continues to animate. However, it never progresses ...
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4answers
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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 ...
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1answer
5k views

Move EFI System Partition to another drive

I had a Windows 8 installation on an HDD, using UEFI as boot. The HDD has the following GPT table: DISKPART> list partition Partizione ### Tipo Dim. Offset --------------- ...
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2answers
958 views

Windows 7 boot manager not localized on UEFI system

I'm running an Italian version of Windows 7, which includes a localized boot manager. However, I recently replaced my motherboard with a new one based on UEFI firmware instead of BIOS (Asus Z87 ...
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2answers
2k views

3TB hard disk displayed as 746GB

in BIOS , UEFI Boot is enabled , ACHI Mode is selected , and the 3TB Hard disk (Seagate ST30000DM001) is installed at SATA Port 3. However, in Windows 7 64-bit, 3TB hard disk is displayed as 746GB, ...
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2answers
39 views

RAID 1 accidentially booted in AHCI mode

I have two Samsung 840 EVO SSD's in RAID 1 (Asus P87-Pro and Intel Controller) with Windows 8.1 Pro on it. After a BIOS update, apparently all BIOS settings was reset, which apparently changed the ...
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0answers
70 views

I can't access BIOS anymore on my tablet

I have an Onda v116w dual OS tablet. Last week I accidently deleted a Windows boot manager file while trying to reset the boot order. Ever since I’ve been struggling with my UEFI settings to convince ...
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4answers
65k views

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

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 ...
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0answers
59 views

Can't enable CSM mode or Fast Boot

I have an ASUS UX302LA laptop and its been working great. A little while back I was loading different OSs on it, and had to disable Fast Boot and Secure Boot Control, and enable CSM mode. After a ...