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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How to create Boot Menu Entry in UEFI Settings using bcdedit w/o copying existing {bootmgr}
Note – This thread How to add UEFI image boot option in BCDedit? is similar but the answer there is irrelevant as it does not describe my case.
This thread How remedy situation with two EFI ...
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Boot a legacy BIOS OS on a GPT mass memory?
I installed Windows 95 (legacy BIOS OS) with DOSBox on a 64 bit PC, on a FAT32 partition (with (I hope) its PBR (partition boot record)) on a GPT hard disk, with UEFI Windows 11 and the ESP (EFI ...
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How remedy situation with two EFI partitions on one drive?
I've got a laptop with two EFI partitions, one for Windows, one for PopOS (I know now this isn't a stable configuration). It was working great for a while - I was able to switch between the two (in ...
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Add DXE driver to an OVMF image
This is an attempt to follow the first bullet point in this answer.
Goal
Create a development environment to test that my DXE drivers are being properly injected into an UEFI firmware image.
First ...
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Problems booting Windows in virtual machine with separate disks for boot and main partitions
I have restored a Windows 11 system from a partition-level backup of the main partition. The system boots, but only with manual intervention.
Initially, it enters a recovery screen (see upper image). ...
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Cloned Windows 10 won't boot
Issue: Windows 10 clones to same disk/different SSD won't boot.
Why: I've got a M.2 NVMe with the following structure:
300 MB Recovery Partition
100 MB EFI System Partition
Windows 8.1
Unallocated ...
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Boot stuck on Dell logo after changing GPU, Secure Boot enabled
I have recently bought and installed an AMD RX Radeon 6600, and now my computer gets stuck at the Dell logo and I cannot get to the BIOS or anything else. After investigating, I found that if I ...
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Mini pc won't turn on with power button, but WILL turn on using the power button if you unplug power and plug it back in
I have a small mini-pc from Aliexpres with a celeron n5105 in it, 16gb RAM and 500gb ssd (both Crucial brand).
It is running Proxmox (Debian) and it was working fine.
After some fiddling around with ...
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Can't use or install Microsoft Windows after changing disk to GPT partition style to use Linux
I am having some trouble installing Windows or using it, originally I had an MBR partition table which only allowed three partitions and I wanted to install Linux and I couldn't so I changed MBR to ...
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How to install Ubuntu bootloader on a particular disk?
I have an SSD (Samsung MZVL....) and an HDD (WDC WD10S.....) on my computer (Lenovo ideapad). Mostly, I use Windows, which is installed on the SSD, but sometimes I need Ubuntu too. My scheme until ...
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How to reset UEFI administration password on HP ProBook 450 G1 notebook?
I have a used HP ProBook 450 G1 notebook.
I want to reset the UEFI, format the disk and reinstall Windows.
Unfortunately, I do not know the password for the UEFI administration account. Therefore I ...
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How does PCIe card vendors sign option ROMs?
If secure boot is enabled UEFI system would permit to run only signed Option ROMs.
I presume PCIe card vendors want their devices to work even if Secure Boot is enabled. Therefore how does PCIe card ...
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Surface Pro - preventing boot loop by changing where boot code is stored
Is there a way to change it so that the Surface Pro boot sequence is loaded from the UEFI MaskROM each time instead of being cached in RAM to prevent a boot loop in the future? I just encountered this ...
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Cannot boot Qubes after successful installation
There is a problem with booting Qubes 4.1.1 after installation marked by installer as successful. The validity of the image is confirmed and hardware requirements should be passed.
SETUP [docs]
Intel ...
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Moving Windows 10 from old BIOS computer to new UEFI-only computer
My customer is running Windows 10 on an ancient computer - so ancient it doesn't even support USB 3, but it is 64-bit. It's some kind of Pentium-class machine that originally had Windows 7 on it. ...
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Can't back to default UEFI BIOS - Thinkpad T480
May you help me with the following:
I switched to Legacy mode to install a stand-alone Linux on my Thinkpad T480. I didn't succeed to Back to default UEFI BIOS (the relevant entries in BIOS are greyed ...
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Standard BIOS update caused BitLocker Recovery with no key
Lenovo Yoga 920-13ikb
bios 5NCN41WW
currently with Win11, likely upgraded from Win10 in the past
From approximately 2017-2018
“You need to enter your recovery key because Secure Boot policy has ...
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uefi shell - download a file via https
I am experimenting with uefi shell from and I wish to implement the following scenario :
boot into uefi shell
download a a startup.nsh script from https remote resource
run the downloaded startup.nsh ...
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Boot mode set to Legacy support but Windows system information shows UEFI
So I have a Lenovo g50-80 having a i3 4005u and I knew that my laptop has UEFI based Windows 10 as the drive is GPT when checked from disk management but to my surprise when I checked my bios options ...
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Windows 7 USB setup freezes at logo on modern laptop
I want to use Windows Vista or 7 mostly because of its skin. I want to use it at my own risk. I've considered embedding it into a VM, like on Virtual Box, but I didn't get satisfied with it. My laptop ...
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Linux from Scratch - EFI variables are not supported on this system
Linux from Scratch 11.1, non system-d edition, is the book I am following. I followed a guide from someone named Kernotex. I followed his video on how to dual boot LFS on a machine with Windows. So I ...
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How to check if the PC has booted into a different OS?
Basically the headline. I want to know if there is a reliable way to see if the PC has booted into a different OS at some time.
We have a few Windows-PCs for our account department, and I noticed this ...
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Bootloop behavior for Win10 installation or Win10 install media
I have a Win10 system I've been using without any issues for ~2.5 years. The mobo is ASUS ROG Crosshair VIII Hero Wifi. The CPU is Ryzen 3950x.
Last week I had a weird occurrence where the system ...
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Windows 10 installation not booting from USB: "Reboot and select proper boot device ..."
I'm trying to install Win 10 from a 128 GB USB stick, without success.
When the PC starts, this is what I see right after ASUS logo etc.:
Reboot and select proper boot device or insert boot media in ...
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where to get a uefi shell/bootloader executable
I have a laptop [hp elitebook 8440p] formally running slax, hoping to run alpine.
I'm in a situation where I don't have my USBoot key [recovery flash stick] only a fat32 8GB flash storage and a stock ...
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What is rav endpoint protection in an old legacy set of bios,mine just says ravs
From what I understand is uefi is the new version of bios @nd legacy is the old blue screen just like legacy usb is the old 2.0 sub,and yes if your firmware supports uefi you can boot versions of ...
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How do I turn secure boot off in UEFI BIOS on an ASUS TUF Gaming board?
I've tried following various tutorials. The closest one to displaying similar screens as I have was this: https://www.technorms.com/45538/disable-enable-secure-boot-asus-motherboard-uefi-bios-utility
...
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Can Windows (or some other OS) Detect that some other OS was running between reboots?
Let us say we have a Dual Boot Machine. Or we have a Linux LiveCD in the CD Drive.
We are running Windows & select reboot or Hibernate.
The Machine exits the OS and goes back to the Booting ...
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Haiku panics at boot "vm_page_fault: unhandled page fault in kernel space"
This is my first time installing an operating system other than Windows, so I'll try to put in extra detail in case I made a stupid mistake somewhere during the process.
I downloaded Haiku from the ...
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USB detected as a legacy boot device only
Windows 11 Pro installation USB flash drive is detected as a legacy boot device only
When I open setup.exe, it shows this error:
Use the other installation disc that says 64-bit. When you insert it, ...
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Dual Boot between Win 7 and Win 11
I have a notebook from my company that was installed Win 7 MBR + Legacy. I need to install a few programs, but they are not compatible with Win 7 anymore and I can't upgrade or do a clean install ...
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How to install Windows 10 on a non-bootable PCIe NVMe?
I have an old PC which can recognize M.2 NVMe ssd on PCIe adapter, but the UEFI BIOS does not support booting from the NVME. And there is no BIOS update for my motherboard (Giga-B75m-D3V).
For Linux, ...
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Windows boots to same drive after cloning
I am trying to transfer my windows install from one drive to another. The issue I am having is whenever I clone the drive and select the new windows boot manager, it boots to the old drive. If I ...
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Is it possible to allow only a certain secure USB boot media to boot an UEFI system?
I want to restrict all USB boot media from my system, except for a certain USB boot drive that I declare secure via a certain key.
Is this possible using UEFI/Secure Boot/TPM? Maybe via TPM? TPM gets ...
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What should be the content of the first sector in a UEFI system with GPT partitions?
As i understand, in UEFI machines there is no MBR/VBR code, and the UEFI firmware directly gives control to the OS boot loader (.efi file).
My question is, what should be first sector of such system ...
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Windows 10 messes up the dual boot of SSD w/ UEFI firmware failing to detect it
My SSD drive on an HP desktop with UEFI firmware [Nov 2016] is loaded with dual boot of Xubuntu and Windows 10, but when Windows 10 shuts down and is booted again, it boots directly to Windows 10 ...
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How to reset Windows10, remove Ubuntu from dual boot, and change boot mode to UEFI?
I have Windows10 + Ubuntu in Legacy Boot Mode.
I would like to do the following things:
Remove Ubuntu from dual boot, so my ONLY OS will be Windows.
Delete all my files and software, really reset ...
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EFI/boot partition no longer recognized by UEFI/BIOS
Context/Goal:
I have my laptop that was dual-boot, one M.2 SSD for each machine (Windows and Arch Linux) and everything worked as it should. I bought a new higher capacity drive for my Windows machine,...
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Installing two identical Linux systems with full disk encryption alongside each other - second one overwrites EFI entries
Disclaimer: I've seen a few similar posts online, answers to which suggested that reinstalling grub might help. I tried it (see below), but for me the issue is still unresolved.
I wanted to set up two ...
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Can I use the full capacity of an external storage drive larger than 2TB with legacy BIOS?
I have an Acer C720P Chromebook running Gallium OS. I'm fairly new to Linux so this is my first time navigating hardware compatibility issues. I'm interested in configuring the machine as a Plex ...
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Having to switch between secure and unsecure boot all the time
I've recently dual booted Manjaro and Windows 11, and have run into a conflict that seems impossible to solve.
I've read that one can not boot Manjaro on secure boot. At the same time, an online game(...
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Windows To Go not booting from NVMe Enclosure on some computers
I managed to install Windows (10) To Go UEFI to an NVMe SSD enclosed in a USB 3.2 case through Rufus. I created the bootable disk on a laptop (let's call it PC1). The first time I booted the WTG, I ...
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uefi/gpt install grub on several external usb disk
My computer uses UEFI
I have several external USB disks, each with a GPT partition table, a small partition flagged 'bios-grub', and each has an Ubuntu 22.04 installed on an other partition.
My ...
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Chrome OS Developer Options Root Password
I'm trying to flash a custom UEFI system or BIOS to my Chromebook (Lenovo c330) and I ran the command in the Shell in Crosh and it asked me for my password. I entered the password for my Google ...
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I have no UEFI/Legacy BIOS boot option. What does that mean?
Throughout the internet, you can see an UEFI/BIOS Boot Mode option (or something similar) present in the BIOS, so one can switch between UEFI and Legacy BIOS mode.
I don't have this option.
This is ...
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VM Freezes and Crashes on Reboot
After installing Ubuntu 22.04 LTS, Windows 11 and Rocky Linux with QEMU 7.0 (qemu-system-aarch64), VM does not restart and freezes. I myself close QEMU with CTRL+C. As a result, it either does not see ...
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grub unknown filesystem. dual booting windows and arch linux
Device: Dell xps-15 9510 running latest arch
I dual boot windows and arch using grub bootloader
I restarted my computer yesterday and was put into grub rescue due to unknown filesystem.
'ls' lists all ...
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Unable to boot MacOS Catalina after removing and re-adding VDI
I was successfully running Virtualbox MacOS Catalina guest. But I needed more space on the volume to upgrade to Big Sur. So I attempted to expand the size of the system volume (which may have been my ...
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EFI file structure
I have system partition on my Windows 10 PC. It contains files
EFI
--Microsoft
----Boot
------bootmgr.efi
------bootmgfw.efi
------bootmgr.efi
------...other files
----Recovery
--Boot
----boot64.efi
--...
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