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 an unattended Windows installation medium/iso/usb supporting Secure Boot and resulting in a UEFI-Windows installation?

Creating a medium from which a system can boot while Secure Boot remains active, is possible with the default Windows iso from Media Creator, but what about edited images? Creating a unattended ...
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Boot to two different systems (including hardware) from a single drive

I've been using a SSD with Windows 10 which boots in UEFI/GPT mode on my laptop. For a while I decided to switch to my desktop PC which has no SSD of it's own. In order to improve responsiveness of ...
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Dual boot to one OS by default, and to other OS upon keypress

I am planning to UEFI dual boot Windows 10 and Arch Linux, currently I have one machine booting with the Windows boot manager and another to Arch through EFISTUB. On the new machine I would prefer to ...
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How does a PC know what initial boot loading image to display when it starts up?

I have clean installed two laptops now, with Windows 10: An Asus laptop and a Lenovo laptop. However, for both installs — I noticed that the PC’s still display the Asus loading image when booting and ...
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Boot correct initrd in UEFI with multiple ESP partitions

I have a computer which boots into Debian using UEFI and the kernel efi-stub. The ESP partition is on the first disk (/dev/sda1) To learn about UEFI booting and the details of linux booting I've ...
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How to use new NVMe SSD as new Windows boot drive, if UEFI can not see the drive, but existing Windows 10 installation recognizes it?

edit I gave it up, so the new Windows 10 is on my SATA 3 SSD, and the NVMe disk is a pure data disk. However I have an interesting experience, which adds something the diagnostics. When I installed ...
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MOBO sees only half of the memory installed

After a good amount of research I know that many similar questions to mine have been asked at least since 2005. What is amazing is that no good answers came forward throughout this time other than the ...
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Boot from USB does not work although it is bootable

I want to install Linux on my Windows 10 tablet (ChiliGREEN E-Board MW065, 1 GB RAM, 8 inch display), so I created 2 bootable USB flash drives, one with Lubuntu 64-bit and one with Zorin OS Lite 32-...
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Windows 10 Freeze on Logo at startup, safe mode and usb installation without loading circle

today my new PC arrived and, as lucky as I am, I got some problems. First things first, the hardware: Gainward RTX 3060 Ti 16 GB Ballistix RAM 2666 MHz AMD Ryzen 5 5600X MSI A520M-A Pro A Crucial SSD ...
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SSD no longer recognized after attempted Ubuntu installation

I have attempted to install a dual boot of Linux (and my existing windows 10), but since the last attempt, one of the hard drive has disappeared. The original setup was two drives, the first of which ...
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UEFI refuses to remember BootOrder value and creates additional ones every boot

I have an issue with an HP Elitebook 8770w, which I am using as a Linux box for various purposes. It runs Ubuntu 20.04 which also acted up during installation and so I was forced to install it from a ...
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Black BIOS screen after enabling Secure Boot?

I am not sure if I have understood the underlying concept clearly. I have MSI B450M Pro board and MSI GT710 GPU based graphics card. Windows 10 installed in UEFI Boot mode on an SSD. I thought to ...
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What is the expected outcome of installing Windows 7 in BIOS mode onto a GPT drive [duplicate]

I'd like to start by saying that i am fully aware that windows 7 is no longer supported, and i am also aware of the implications of running an outdated vulnerable operating system on my physical ...
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UEFI Boot options menu at every boot : how to make it work?

I have a Asus Strix X99 gaming motherboard with a I7-6800K CPU https://www.asus.com/Motherboards/ROG-STRIX-X99-GAMING/ I have two M.2 NVME SSDs attached: SSD N°1 = Samsung SM951 512G M.2 PCIe 3.0 x4 ...
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Cant Access BIOS

I am unable to access Bios on my system. I disabled Fast startup and my Bios mode is UEFI. I need to enable Virtulization for Docker. I have tried advanced startup but still unable to access UEFI ...
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Why does Windows reset my UEFI settings with every update?

Every time there's a Windows update, my UEFI settings reset to the default. Most of these are fine (timing and boot work well on the defaults), but the one that really irks me is the "hotkey"...
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Selecting entries in boot manager without using keyboard

My goal is rather simple to put in words: I want to install Windows and Chrome OS in dual boot on my Surface Go 2 and be able to select entries in the boot manager without having to use a physical ...
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Unable to boot from thumbdrive containing Windows setup

I just completed my build in an H510 with the following parts: B550 Aorus Pro AC Ryzen 5 5600X Asus Dual OC RTX 3070 WD Black SN750 (1 TB) TridentZ RGB 16 GB (DDR4 3600 MHz) Masterliquid ML240L V2 G....
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Unexpected EFI system partition ID on MBR disk

(Originally posted on stackoverflow, closed as off topic. Closing message recommended I ask on superuser instead.) I've been reading about the Linux boot process, and tried to orient myself by ...
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Can I use my own driver on Windows without having to ask MS for permission while keeping Secure Boot on?

As per the subject : I want to write my own kernel mode driver I want to be able to use it with Secure Boot on I don't want to ask for permission to use it (no WHQL testing or attestation signing) ...
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What's the meaning of the bytes between `FilePathListLength` and `Description` in a `Boot####` EFI variable?

I was playing around with the EFI variables in /sys/firmware/efi/efivars and stumbled upon something I don't understand while trying to parse their contents. According to the latest spec of the EFI ...
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How can i switch back from csm mode to uefi mode?

I just built my computer and I have accidentally switched it from uefi mode to csm mode. I still havent installed windows but im wondering if there is a way to convert it back to uefi?
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Install windows on USB from existing windows installation

I have old Windows 7 laptop with producent-changed Windows 7 image (very small + touchable screen support) but with very small disc. After multiple attemps I failed to make clear installation of ...
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PC doesn't boot into BIOS but Windows

I'm using Win10 and I'm not able to boot into BIOS, nor by hitting F2 or DEL while booting neither with the Windows 10 option: "Recovery / Advanced Setup / Troubleshoot / Advanced options / UEFI ...
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Is Legacy BIOS the interface itself or just a technology? [duplicate]

I was wondering if Legacy BIOS is the blue interface, but then why is EFI an interface (UEFI) and a boot mode in one while BIOS is the interface and Legacy is the boot mode (separate things)? Is (U)...
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Do I have BIOS or UEFI?

As the title says, I want to know if I have BIOS or UEFI. I want to know if I have to use MBR or GPT partitioning schemes for a bootable USB. I have Windows 10 on my PC. According to Windows's System ...
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efibootmgr in case of lose power

Lets say my boot entries look like below: efibootmgr -v BootCurrent: 0001 Timeout: 1 seconds BootOrder: 0001,0002 Boot0001* UEFI OS HD(1,GPT,dd09316a-c79c-4f0d-9ce3-aa67462b9f24,0x800,0x9000)/File(\...
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Issue booting Win10 with UEFI (new PC build)

I just built a PC (specs below) and I’m having a rough time creating a bootable Windows OS USB from my Mac. I think it’s because UEFI requires FAT32 (not exFat and NTFS). The only version of Windows ...
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Why not install UEFI and BIOS operating systems on same PC?

I have read in several places that you should avoid installing UEFI and BIOS OSes, even on different disks. Why? I need to install a BIOS operating system, and also an UEFI OS, on the same PC. So I am ...
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1 vote
1 answer
3k views

Unable to boot gigabyte brix from Windows 10 installed on SSD

I have Windows 10 installed in SSD in legacy mode (not UEFI). I have connected it to gigabyte brix. When I turn on the Brix, its does not boot from SSD. Instead it gives me UEFI shell: When I type ...
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Dual boot with 2x Windows 10 on a single drive (UEFI): why is one Windows instance doing a complete boot cycle?

I just setup my HP Notebook with 2 instances of Windows 10, installed on a single drive, and using UEFI style dual boot (i.e.: the bootloader starts that blue option screen letting me choose between ...
Lothar Mueller's user avatar
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1 answer
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How do I make an EFI file boot properly to Arch Linux?

I have installed Arch Linux on a fresh SSD, and I am having trouble booting into it with UEFI. I successfully boot to the ISO on a USB, and I believe that I have successfully installed Arch Linux on ...
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What does "factory default" mean regarding UEFI keys stored in a TPM, in a PC built from scratch?

I built a PC from scratch a while ago, and after learning the recommended requirements for UEFI Secure Boot and Microsoft's Bitlocker, I installed an Infineon TPM in my motherboard. My understanding ...
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Wiped hard disk completely removing all partitions - now computer won't start from Ubuntu live stick or Windows ISO

Today I wiped the hard disk of an Asus Windows computer from 2015. It has Secure Boot. I used an Ubuntu Live stick, opened the Disks app and removed all partitions, then used Shred to wipe the entire ...
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Infinite reboot loop "System BootOrder not found" after Windows 10 install and Ubuntu install

After wiping a disk, installing Windows 10, then installing Ubuntu with Grub, I experienced an infinite reboot loop with this error message (displayed less than 0.5 second, hard to read!): System ...
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Unable to Boot into other Hard drive

I have 2 drives in my windows laptop, one is HDD and another one is SSD. Initially I installed Windows on the main Hard disk and after few months I bought an SSD (lets call this SSD1) and installed ...
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EFI Windows Bootloader Recovery

i deleted windows boot loader in efi instead of ubuntu by mistake. Now i am left with ubuntu without windows. Is there a way to fix the windows boot loader from ubuntu terminal as i couldn't open ...
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How to convert from EFI to MBR boot loader (and / or GPT disk to MBR disk) in Arch Linux without losing data

I've installed arch linux on my disk sdc,where sdc1 is the efi partition and sdc2 the root partition. I'm also trying to boot this installation with esxi 7,but it seems that it refuses to boot because ...
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Windows 10 Dual Boot Error

I am trying to set up two Windows 10 installations on the same machine (UEFI) using two separate NVMEs. I've followed the steps outlined in this video. When booting up the original Windows 10 ...
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Can we install 3 OSes in a system in legacy mode?

I have Windows 7 and Ubuntu 16.04 installed in my system. Both are installed as legacy. Now I want to install Elementary OS in my PC and don't want to remove the other operating systems. I read on the ...
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Resizing EFI partition followed by MSR (Microsoft Reserved Partition) - Arch Linux

I have a dual boot setup (Arch/Windows 10) and after installing Windows 10 BIOS update, my ESP partition is now full. I did not follow the Arch recommendations to set the ESP partition to 550MB and I ...
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64GB memory installed but only 32GB detected in UEFI BIOS and OS

I have extended my memory to 64GB (4x16GB) and noticed a strange behavior: First the mainboard doesn't boot and turned of automatically. Then I updated the UEFI (changelog shows memory compatibility ...
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Blinking cursor/underscore on older computer when booting off Windows Installation USB Key prepared with the Windows Media Creation Tool

In attempting to install Windows 10 on a newly-installed SSD in an HP Pavilion DV9000 laptop, I created a Windows Installation USB Key using Ventoy and the Media Creation Tool. While I'm able to boot ...
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14 votes
1 answer
54k views

How can I reboot or shutdown the system in an EFI or UEFI shell?

Having consulted resources related to the commands available in a UEFI/EFI shell, I cannot find two commands I would expect to be available: reboot poweroff, halt, or shutdown What am I missing here?...
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System boots into a blank screen on reboot after updating CentOS 8

After updating CentOS 8 on an HP SFF desktop it boots to blank screen. Manufacturer: Hewlett-Packard Product Name: HP EliteDesk 800 G1 SFF Memory: 8GB Disk: 120GB SSD
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Dualboot: Ubuntu not booting at all. Windows booting goes through GRUB command line

I installed Ubuntu in addition to my existing Windows 10 using a pendrive.But unable to boot into Ubuntu. Initially (before try 4), only Windows Boot Manager and the hard disks were visible in BIOS ...
Nilothpal Pillai's user avatar
2 votes
1 answer
1k views

Can't boot from aomei uefi boot stick

I am not able to boot from my previously used legacy aomei boot stick since our new notebooks are uefi only. So I tried creating a new uefi boot stick. Unfortunately I was/am not able to see any ...
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Microsoft UEFI-Compliant System not showing in Device Manager

I installed Windows 10 Pro 64bit on a GPT SSD and started Windows on UEFI Firmware. When I go into Device Manager, I can't see System Firmware and Microsoft UEFI-Compliant System even when I showed ...
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1 answer
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Can't move SSD system disk to UEFI Boot Sources section

I have a HP Pro 3330 MT PC with Windows 10 64-bit, 8GB of RAM and a SSD. I tried to boot into the BIOS to switch to UEFI. I accessed the Boot Order and saw two sections: "UEFI Boot Sources" ...
Wolf20482's user avatar
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2 answers
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Ubutnu 20.04 fresh install / no bootable device

I have recently installed a fresh Ubuntu 20.04 from a live USB completely formatting my hard drive. However, the installed OS does not register with the UEFI and it does not even try to boot -- fails ...
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