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Questions tagged [uefi]

The Unified Extensible Firmware Interface BIOS (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI replaces the Basic Input/Output System (BIOS) firmware interface originally present in all IBM PC-compatible personal computers

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What is the difference between Secure Boot and Verified Boot?

As I understand it, both "Secure Boot" and "Verified Boot" work in the same way. In particular: on boot, the first thing that runs is code found in ROM. This ensures that it can be "trusted" the ROM ...
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Cannot boot into Ubuntu with hardware RAID 5 and separate /boot partition

ISSUE: When I go to boot into Ubuntu 18.04 server I get to the grub console and the ls command only shows: (hd0) (hd1) (hd2) (hd3) (cd0) When I use ls for each drive I get "Filesystem is unknown." ...
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ubuntu 18.04 upgrade failed for UEFI

After I upgraded my Ubuntu 16.04 to the latest 18.04, now my laptop doesn't start up at all and gets stuck at the grub command line. I have tried boot-info and boot-repair, in UEFI and BIOS mode (from ...
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Directly boot Android boot partition from GRUB?

I'm experimenting with an Intel-based Android laptop (Chuwi Hi10 Pro) and have installed Ubuntu 18.04 in parallel to the original Android 5.1 installation. The device is actually designed for dual-...
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28 views

Windows 10 Twice on same machine (again)

Windows 10 v1709 wouldn't update to v1803, so downloaded OS image, disconnected SSD with v1709 installed, and did custom clean install of v1803 to new SSD formatted as GPT. Verified new v1803 working, ...
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VM stuck in boot loop: Boot critical file C:\EFI\Microsoft\boot\resources\custom\bootres.dll is corrupt

A VM I built for a coworker has crashed and will not boot. It boots to a blue-screen. When I tried to run startup repair I found this in the error log: Root cause found: Boot critical file C:\EFI\...
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1answer
40 views

screen disconnects during linux boot until physically reconnected

I have got an Asrock J4105 mainboard During the boot, at some point in systemd, the screen goes black (saying no signal) until I take the HDMI cable and remove it and plug it back in. This is what I ...
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Cloning computer with UEFI boot

I have a mini PC where I have installed Arch Linux with UEFI boot. I'm trying to clone this install on other identical mini PC. I tried using Clonezilla alternative but at the end of the restoration ...
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Audio only works if startup chime is enabled in BIOS

I've got an ASUS U31SD. After replacing my HHD with an SSD and installing Linux Mint beside Windows my audio device only works after booting up into Windows or Mint if I enable the startup chime in ...
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52 views

Changing Boot Mode from UEFI to Legacy

I wanted to dual boot boot My Windows 10 with Zorin OS . I have done this before with Windows 7 . But when I tried installing EasyBCD in Windows 10 , It told me that most functions of Easy BCD wont ...
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Remove duplicated options in boot options, BIOS

I have dual booted my laptop. I have multiple choice in boot options in BIOS that are duplicates. The Ubuntu option is sometimes gone when I shut down from Ubuntu. Why does Boot option keep on ...
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What data can I safely remove, AKA, put a big partition in a smaller space

I have a system containing the following disks: 1x Western Digital Caviar Black 1TB with Windows 10 1x Western Digital Caviar Black 1TB with Gentoo Linux 1x Western Digital Caviar Black 1TB with ...
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1answer
42 views

How to convert a Win10 UEFI VHDX to BIOS boot?

I tried to use Minitool to convert the partition table to MBR and then tried to write the bootloader with bootrec, but that doesn't work at all. SeaBIOS returns "A disk error occurred". Thank you ...
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UEFI configuration for DDR4 memory on ASRock X99 Extreme3

I once over-estimated my knowledge of hardware (especially combination of motherboard and memory) and bought 4x 16GB GeIL EVO Potenza DDR4-3000 DIMM CL16 for an ASRock X99 Extreme3. I tried to ...
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I'm not able to boot into windows as well as Live USB is also not working

Recently I was trying to dual boot my windows with Linux mint. After installing Mint from Live USB I removed my USB before it was prompted to. As the result I found 5 entries in the grub menu : 1. ...
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1answer
85 views

How to enter BIOS on Windows 10 Laptop that fails to boot with previously Fast Boot setting enabled?

There are a few related questions on this forum e.g. here & here, however I am still considering a slightly different situation. On a Windows 10 Laptop with Fast Boot enabled, the laptop does not ...
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Deleted Ubuntu partition. Now Windows nor Linux can start due to GRUB's normal.mod not found

I had Windows 10 and ElementaryOS Freya (Ubuntu 14.04) installed and both booting happily through GRUB. This is how my disks were set up: /dev/sda /dev/sda1 ntfs 420MB /dev/sda2 ntfs 210GB - ...
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31 views

UEFI / Legacy issue in Boot

I downloaded Linux Mint v19 and successfully installed through legacy boot (why I did it it through legacy, I'll explain later). However, turning on the computer only boots straight into Windows, ...
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Can I replace boot files with those of older version for installed/installation of windows 10?

I was running a windows 10 insider slow ring build, when a new one became available but when it restarted to update it would always freeze at the rotating dots, I switched to the fast ring but the ...
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1answer
97 views

How does one find GPUs that use UEFI GOP instead of legacy VBIOS?

I have a Mac Pro 4,1 which uses UEFI and has no legacy BIOS support. I'd like to purchase a graphics card which uses UEFI GOP by default instead of Legacy VBIOS since, otherwise, I won't see my boot ...
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89 views

How to fix the issue “Reboot and select proper boot device or insert boot media in selected boot device and press a key”

Problem: I have just finished performing a clean installation of windows 10 to my laptop (Using command prompt from windows recovery environment). Every time I want to use it I have to access Boot ...
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1answer
24 views

Laptop only boots to grub> command shell

I've managed to semi-brick a laptop by using it to install Xubuntu to an external drive. The laptop is a Toshiba Satellite NB10t-A-10F. Any help would be greatly appreciated. How I got here: I told ...
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69 views

Boot from USB no longer available after boot-repair procedure

I used to have a dual boot system with ubuntu 12.04 and windows 8. After 4 years during which I was not using Windows I decided to update to Windows 8.1. After the update I was not able to boot on ...
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41 views

UEFI freezes whenever I press enter at “Boot” option to change boot order (other UEFI settings do not freeze it)

I am struggling with my Thinkpad dual boot setup and fixing one problem might have led to another. I am a complete noob and not sure which piece of info would be relevant to the problem, so I will ...
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1answer
29 views

Windows 10 recovery only works in UEFI

I can't boot into Windows 10 anymore. I created a USB Recovery disk, however the recovery-disk only boots up in UEFI-mode, but my Windows-SSD (that I want to recover) is only being recognized in "...
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174 views

How can I reset the Secure Boot keys on my Surface Pro 4?

I have a Surface Pro 4 and I guess my secure boot keys got messed up somehow. On Surface Pro 3 this fix is as easy as going into the UEFI and resetting to the default keys, but there's no such option ...
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91 views

UEFI fails to boot Windows 8 from live usb

I've burned windows 8 image on my usb using dd. There all files like boot efi bootmgr etc. on it. When i press Esc during boot, there comes a menu with 3 options: Ubuntu, UEFI Sony, Enter setup. When ...
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157 views

How to safely set, change, remove values of EFI variables

After spending hours debugging a problem where systemd-boot started skipping its boot menu and in general ignoring its configuration file /loader/loader.conf (on the EFI partition), I've discovered ...
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1answer
85 views

EFI fails to boot Linux with GRUB - blinking cursor screen of death

I bought an HP Probook x360 11 G1 EE laptop with an EFI boot and Windows preinstalled. Since there's no option in the BIOS to support legacy boot, I can't do without EFI. I tried EasyBCD to install ...
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77 views

How to remove UEFI supervisor password? Acer Aspire 771G

2 years ago I try to install a Linux distribution. - To do so I need to disable the secure boot and set the supervisor password. - My keyboard was giving me problems at that time and now i don't ...
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130 views

Alternative to Rufus for Windows Vista [closed]

Are there any alternative to Rufus which would work on Windows Vista? I need to make a Windows 8.1 bootable UEFI USB and a Windows 10 bootable UEFI USB. Thanks!
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Windows 8.1 Clean install reboots to installation menu

I am trying to re-install Windows 8.1 (using a bootable DVD) and on the first reboot after having selected the unallocated drive where to install windows, I am prompted to ''Press any key to boot from ...
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1answer
83 views

Dual boot UEFI is not showing the continue to Windows option

I've been trying to make Ubuntu my primary boot, however it's no going well. Using the EasyUEFI utility in Windows I tried to change the Windows Boot Manager path as advised in this answer. I ...
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After installing an Ubuntu dual boot, Windows does not shut down. Cannot update the BIOS as a fix

I have an MSI GE63-8RF laptop with a GeForce GTX1070 graphics card and was using Windows 10 without any problems. Yesterday I wanted to set up dual booting and installed Ubuntu 18.04. Unfortunately my ...
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1answer
56 views

Trying to boot Surface 4 Pro to WINPE - USB

I've been trying to boot up to WINPE on 2 different Windows 10 tablets from an external USB hard drive. The tablets won't boot from USB. Strange enough, the same external hard drive with the same ...
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1answer
25 views

Computer won't pass POST

When my computer powers on it just shows a black screen on the monitor, can't press f11 to go into UEFI and it just hangs there until I pull the plug or hold power. This happens every other power ...
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stuck 4 minutes at Gigabyte bios screen

I have a strange problem when I turn on my PC. I am stuck about 4 minutes at this screen before showing Clover boot loader: Since now my PC (Gigabyte Z170X + i7-6700 + GTX970) was OK (NvMe full speed,...
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Install/run-live ISO images from HD partition

I want to partition my HD this way: some partitions to install OS (e.g. Windows 7 x64 and Linux or even OSx86) and the remaining for data. I want the data partition to be NTFS and bootable with a ...
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1answer
13 views

How to create recovery media for Windows 10 (Legacy)?

I've created a backup system image of a Sata SSD using Windows, that has been through a few upgrades. Taking another backup of that drive is now impossible, but I have a recent system image taken with ...
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31 views

Kali and Win10 dual boot on UEFI - BSOD almost every time

Recently i set up a dual boot with Kali Linux on my windows machine (DELL 5559). Linux works fine, but when I try to boot to Windows thing south :( Too often I end up with blue screen of death with ...
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partition scheme for Lubuntu and MacOS

Towards installing Lubuntu 18.04 onto a Mac running rEFInd: /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ...
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3answers
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Home-built PC will beep with no problems and display the Gigabyte logo, but I can't get to BIOS setup or anything

Parts: Motherboard: Gigabyte GA-970A-DS3P FX Power source: Jupiter 600 watt 80 plus bronze Hard Drive (HDD, not solid state): Seagate Barracuda 1TB CPU/Processor: AMD FX 6300 Graphics Card/GPU: GTX ...
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1answer
60 views

How do I change the UEFI Boot Order from within Windows 10?

I have multiple Operating systems installed, each with their respective EFI file in the ESP (EFI System Partition). For example: I have Windows 10 at \EFI\Boot\Microsoft\bootmgr.efi, and I have ...
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Cant find my boot.efi file under EFI partition macOS 10.13.5 HighSierra

0 down vote favorite I recently mounted my EFI partition after updating to 10.13.5 High Sierra. I tried to look for my boot.efi file but cant seem to find it only found SMCFlasher.efi and some .scap ...
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Using rEFInd to execute real mode boot loaders

I am interested in making my own operating system. To start, I am going to try it out inside a virtual machine. In the future, I would like to run it physically. This is the tutorial I am following ...
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70 views

Backup/dump UEFI firmware

I need to backup or dump my PC's UEFI firmware. How can I do that? even if I can it checksum or signature it would be helpful. UEFI Model: Phoenix for Think-pad
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1answer
1k views

How can I modify a Windows 7 32 bit ISO to install in UEFI mode?

Long story short, I have a Windows 10 tablet that's running 32-bit Windows 10. I'd like to install 32-bit Windows 7, but the tablet's BIOS is UEFI only and doesn't have legacy/CSM boot options. Is ...
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1answer
36 views

PC won't boot from USB medium

So I bought my laptop with a legitimate copy of Windows 8.1, replaced it with Debian 9/Stretch and then dual booted it with Android X86, after that came Windows 10 and Arch. Quadruple booting was no ...
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1answer
59 views

How to make external linux boot disk that can be used in both linux and windows

try to make Linux installed in external harddrive that I can pre-select in boot option to boot it from any machine doesn't matter whether I am using windows or linux machine as my primary OS. Windos ...
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1answer
151 views

Screen goes black after trying to access BIOS Setup

I've been trying to access my BIO settings, in order to change the boot order to boot from USB first. When booting the computer and holding down F12, the BIOS menu comes up fine, and I can access the ...