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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Revert back from legacy to UEFI boot

I have Lenovo G40-30 which came pre-installed with Windows 8. I changed boot mode from UEFI to legacy mode. Now I can't access the bios by pressing any key F2 or F12. Now the computer starts very ...
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2answers
26 views

how to install windows 7 with size more than 4 GB using gpt usb and UEFI mode?

I know that, in order to install Windows 7 on my windows 8.1 laptop, I must disable secure boot then use the diskpart command to convert my USB disk to GPT and format it as fat32. I made every thing ...
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10 views

Auto power on UEFI tablet (Linx 7)

may not be the correct place to post this. www.linx-tablets.com/linx-7.html I need to get my Linx 7 tablet to auto power on when power is applied (when not in connected standby)?. I've asked the ...
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27 views

Restore .gho image with UEFI

I have created a Ghost .gho image (split among many files) from a Toshiba Satellite with Windows 8, with a version of Ghost which I do not recall (it is either 9.0, 11, or 11.5; I am still trying to ...
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1answer
26 views

Computer does not boot after changing hdd and reverting back

1) I have an existing HDD in my computer that dual boots linux and windows using the traditional bios way. 2) I then took out the existing HDD and swap in a new HDD to install linux on it with uefi. ...
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1answer
179 views

Caution: invalid backup GPT Header (gdisk)

Each time I boot into my Ubuntu installation, when I open gdisk I am given the messages: GPT fdisk (gdisk) version 0.8.8 Type device filename, or press <Enter> to exit: /dev/sda Caution: ...
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3answers
1k 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 ...
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Install Grub2 (with EFI-IA32 support) to the ESP partition from within Windows 8.1 (32-bit) - Bay Trail tablet

This is a very complicated idea, and it's been stuck in my head for a while now, so bear with me. In this question, when I say "Grub2", I am referring to the "EFI-IA32 version". The device I will be ...
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1answer
1k views

Bypass UEFI on native Windows 8 Acer Aspire V5

I'm working on an ACER Aspire V5-121 OEM Windows 8. The original hard drive with the OS was removed, and I have a blank one... but could not install any other OS on it, not even Win 8. As the V5-121 ...
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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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5answers
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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 ...
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1answer
2k 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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1answer
102 views

Samsung SSD is not visible in Bios

I have Dell Inspirion N5110 i7 , and I want to upgrade to SSD and I bought Samsung SSD PM810 2.5" 7mm 256MB SSD drive. Everythis is fine, I cloned my system drive successfully on to it, but I can't ...
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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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2answers
52 views

How to boot USB stick in BIOS mode?

I have an UEFI-motherboard - ASUS P8Z77-MPRO. It supports CSM(Compatible Support Module). My Win7 is installed in BIOS mode, I've checked it. This because, I must install ArchLinux in the same ...
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38 views

Booting SD card from UEFI

I've come across the problem. I'm trying to boot a bootable SD Card using UEFI. However, this doesn't work, as there is no "SD Card" boot option AFAIK. I have tried putting all the USB-related ...
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3answers
86 views

Can Windows 8 and 7 be installed on the same UEFI computer?

My system has UEFI, and I want to install both Windows 7 and 8 on a large drive formatted for GPT (I want to also install a few other operating systems, and I need more than 7 partitions). After ...
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2answers
127 views

How to change active boot partition of Windows 8.1 UEFI?

I've a 64 bit Windows 8.1 on GPT / UEFI and am trying to boot to another OS without a CD-ROM or external harddisk. I've created a fresh partition (Z:) and copied Puppy Linux.iso over to it. However, ...
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2answers
2k views

Fix Windows 8 EFI Boot on 32-Bit images

I've been trying to install Windows 8 on a UEFI-based computer using a USB flash drive. As far as I've have been able to gather, there have been some issues with this kind of installation, as the DVD ...
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0answers
18 views

How to change UEFI bootmanager from EFI Shell?

When booted to the EFI shell, I see I can access the EFI variables, which contain the boot manager settings. But how do I change boot order or add new boot options while inside EFI shell?
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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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1answer
42 views

Win7 x64 UEFI install error

I bought a Grundig 1452 b1n2 Laptop. It had Win8 x64 (2GB RAM, very slow) I decided to install Win7 x86 via USB (no DVD drive on the laptop). After some struggle with the BIOS I managed to boot into ...
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2answers
48 views

I wanted to install arch linux on a UEFI/GPT system and had questions about the process

My original formal question was "How do I install Arch linux on a GPT/UEFI system" This is meant to be addressed with the documentation provided by the arch linux community, located here: ...
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2answers
2k views

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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1answer
21 views

Enter UEFI-Shell using the UEFI-bootmanager?

How do I create a UEFI-Bootmanager entry that jumps into the built in EFI-Shell using efibootmgr? If this is not possible: Is there another way? Does every UEFI come with a shell?
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1answer
47 views

System does not boot DVD drive in secure boot/UEFI mode

I had to disable Secure Boot and enable Legacy Support to be able to boot a Windows 8.1 64bit DVD from the CD drive in the BIOS menu to install Windows. Is there any reason why this happens? Is there ...
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1answer
2k views

ASRock UEFI Setup Utility No option to disable secure boot

I want to downgrade my computer from Windows 8.1 to Windows 7. I originally had Windows 7 on my desktop, then upgraded to Windows 8, then Microsoft basically forced me to upgrade to Windows 8.1. I was ...
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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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0answers
80 views

Setting up VHD Boot for Windows 8.1 32-bit OS on 64-bit UEFI

I have a Surface Pro 3 that natively runs Windows 8.1 64-bit. By extension, the UEFI on the device has a 64-bit boot loader. I am attempting to setup the device to allow a VHD boot into a Windows 8.1 ...
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2answers
301 views

Is it possible to bypass the 5-second delay in EFI shell?

Due to my unusual hardware configuration (see Graphics card not working on Windows 8.1 on Mac), i am forced to set two PCI registers using the mm EFI command before being able to boot Windows. Right ...
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3answers
2k views

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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1answer
106 views

Cannot boot after migrating my Windows 8.1 installation to a new drive

I want to migrate my Thinkpad X1 Carbon (2015)'s Windows 8.1 installation to a new 240GB PCIe 2.0 4x SSD. I figured that Clonezilla may work for that but cannot boot now. Turned off SecureBoot ...
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1answer
31 views

Using Shim with Debian

How to enable Secure Boot with Shim on Debian? I have been following all sorts of articles online but now I have lost my patience. Anyone know how?
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1answer
3k views

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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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
287 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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39 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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38 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
135 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
108 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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0answers
16 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
842 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
2k 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
4k 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
106 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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2answers
27k 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
88 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
3k 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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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 ...