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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Installing Windows 8 on Samsung 530u4c-s04

I've got some problems installing Windows 8 on my Samsung NP530 U4C S04de. The old HDD was defective so I have bought a new SSD! I could not install Windows. In the Windows installation menu where I ...
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69 views

UEFI entries added with efibootmgr and BCDEdit don't persist, but with hbcfg they do

Why is it that when I add/modify UEFI boot entries via bcdedit or efibootmgr they don't persist after a reboot, but when I use rEFInd's bcfg they do persist? And how can I fix this? (It doesn't make ...
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261 views

Where is the UEFI boot order stored?

I know the UEFI boot loaders are stored on a FAT32 partition on my (usually GPT) drive, but where is the boot order stored? My reasoning: It can't be stored as part of the firmware settings, since ...
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4answers
173 views

MSI GE70 laptop: bios fields change independent of user (i.e. user input)

My MSI GE70-2OE has experienced 3 curious incidents of bios changes in certain option fields, namely at least 2 fields where the user's options, for example, were ACPI, UEFI, IDE, LEGACY, RAID. The ...
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2answers
260 views

Win7 Turning on AHCI

I recently purchased a 3TB WD internal drive as a media storage. I thought this would be no problem since i have a UEFI Bios (ASRock P67 Pro3). After not being able to use any of the storage beyond ...
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203 views

KeyTool.efi - Can not add new db key in user mode - Secure Boot

On virtual machine with OVMF implementation of Tianocore UEFI, I ran signed Keytool.efi (Part of efitools-1.5.3-1.1.x86_64 ) initially in Setup Mode. I inserted db (signed by KEK Private) , KEK ...
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35 views

Windows 8.1 on a PC with UEFI BIOS - no partitions set as Active in Disk Management

I've Googled this all over the place to no avail. I'm looking in Disk Management and none of the partitions are showing active. Surely the partition the current OS boots off is the active partition. ...
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1answer
121 views

Is there any advantage to a particular boot order when using UEFI?

Just built a system with motherboard that supports the UEFI. I didn't realise what it was at he time and was interested to know why it appears to be attached to a 1TB HDD. I have in my system room for ...
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1answer
626 views

When I boot a USB in UEFI mode, it just boots windows instead. Legacy mode works fine

I've been trying to get a dualboot setup of Windows (8.1 when I started, now 10) and Ubuntu for a while now. When I install in legacy mode, I cannot get the grubloader to appear. I can look at my ...
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1answer
233 views

Is there any reason to use UEFI with Windows 10?

Or another way of putting it, will I be impacted in any way if I use legacy BIOS mode with Windows 10? I'm not fond of having a new complex software layer underneath my OS especially with the recent ...
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1answer
6k views

Booting Windows 10 with bootia32.efi on a 64-bit UEFI System

I have downloaded Windows 10 AIO disk but it has only the bootia32.efiwhich can be booted only 32-bit Systems & not on 64-bit. I have browsed around the internet and found some suggestions that ...
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1answer
555 views

UEFI BIOS won't recognize USB

I recently tried to install Kali Linux from a live USB. This didn't go too well. I used Rufus to create a live cd on my USB from the Kali Linux ISO. Then I rebooted, and went into BIOS to boot from ...
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1answer
499 views

Can I add Windows to my systemd-boot bootloader if I have separate EFI partitions?

I've just installed Arch Linux on to a new set of partitions on my Windows 8 machine. In doing so, I created a new 512MB EFI partition for Linux to load from, leaving the existing Windows EFI ...
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0answers
57 views

UEFI Secure Boot Keys

Out of curiosity to understand Secure Boot, I explored Tianocore’s OVMF along with QEMU virtual system on Linux. I could experiment & see how Secure boot prevents unsigned efi file from running ...
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3answers
37k views

After Windows 10 upgrade I can no longer access BIOS

I posted a question recently regarding my Windows 10 upgrade which ended up with a black screen and cursor. QUESTION I reverted back to Windows 8.1 using the "Revert to previous build" option in ...
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1answer
365 views

PXE boot in uefi mode

I'm building a pxeboot server and including both legacy boot and uefi boot options. The legacy boot works perfectly but while doing an installation in uefi mode, the client machine network boots, ...
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0answers
557 views

Installed Ubuntu next to Windows 10 caused nothing to boot anymore

The following broke my PC. Installed Windows 10 Education x64 final release Booted Ubuntu 15.04 install disc Installed Ubuntu with option to install next to Windows Installation said it has been ...
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186 views

How to Change/Remove UEFI Hard Disk Password

I am using an ASUS laptop running Windows 8 and have forgot a UEFI password. The password isn't essential to startup, for I have a user password and a master password. I know the user one, but I've ...
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0answers
56 views

Adding a windows partition to an existing Linux GPT/UEFI drive

I have a working Linux system that boots from a GPT/UEFI drive. I would like to add a windows partition to this drive, without destroying the existing boot system in the process. Theoretically, I ...
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1answer
3k views

How to test whether Windows 10 was installed with UEFI?

I need to decide whether it is more straightforward to create a bootable Ubuntu drive in UEFI or standard BIOS. I do not want to create or install it through any more ambiguous route than necessary ...
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2answers
443 views

Windows USB EFI boot files

I've been trying to boot up my Win7 USB stick into EFI mode as the disk I want to install it on, is GPT. I have tried to modify the installation media (including copy bootmgr.efi, bootx64.efi and ...
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1answer
445 views

boot loader(GRUB) not recognized in partition along with windows boot manager

First, I'll explain my situation Device: ASUS x205ta with 32GB eMMC (Windows 8.1+Bing installed). Lets call this /dev/mmcblk0 usb flash drive: 64GB Sandisk ultra. installed Ubuntu 14.04. Lets call ...
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1answer
499 views

ubuntu installation on usb flash drive will not boot

here's the partitioning I've done during ubuntu install https://youtu.be/BcRnqqybMIQ installing OS: Ubuntu 14.04 64bit AMD64 device: Asus x205ta ubuntu bootable usb drive created and BOOTIA32.EFI ...
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2answers
2k views

ASUS Q502L “no battery detected” - Windows 8.1

I bought the specified model about one month ago. I immediately upgraded HDD to SSD and my system seemed to work fine for three weeks. I left my computer in my car one morning, and when I tried to use ...
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130 views

To which extent will bitlocker affect my boot chain

My laptop has the following setup: uefi (no secure boot) gpt ssd custom bootmanager (refind, similar to grub) leading to windows 8.1 (via windows bootloader) and a varying linux distro (via grub) ...
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408 views

Cant navigate UEFI menu on my tablet.. Accidently disabled USB

I own a no-brand Windows tablet that has only a single USB port, which I connect a keyboard that has an inbuilt USB hub where i put the USB with the image. I am running Windows 8.1 x64. Not sure on ...
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1answer
506 views

Images (e.g. with Clonezilla) of Windows and Linux on a UEFI computer

I use Clonezilla with success for many years to make images from partitions that host Windows 7 or smaller and Ubuntu and other operating systems. Making images and restore them was easy for me. But ...
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15 views

Can I delete the BIOSUPDATE partition (with ASrock z87)?

I found a partition on my secondary (!) storage drive, not the system storage drive: As you can see it is in the way of easy repartitioning. I have an ASRock Z87 Mainboard, used the update Bios via ...
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1answer
298 views

Bootable usb not recognized in UEFI disabled mode unable to dual boot

I want to dual boot my laptop(lenovo G580). It currently has windows 8.1(unactivated). Now I also want to install ubuntu 14.04 64-bit, so basically I was trying to dual boot using bootable usb drive. ...
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0answers
56 views

How do I replace the dump of my USB recovery media with a more simple EFI partition in this situation?

The situation is as follows: this is a new Dell Precision M3800; it comes with a Windows 8.1 pro version and a USB recovery medium; the machine uses UEFI; I immediately scratched Windows and ...
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524 views

Lenovo Ideapad U410: BIOS in UEFI mode failed after update

I updated the BIOS (65cn99ww.exe) to laptop Lenovo Ideapad U410 (Windows 8), and after computer restarted itself: the system couldn't start, it tried to repair the system on booting, The bios shows ...
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1answer
68 views

Upgrading Win 8.1 to win 8.1 enterprise, USB boot

I know that Win 8.1 (Basic Pack) cannot be upgraded to Win 8.1 enterprise directly, by "add features to 8.1". I have the 8.1 enterprise image (ISO) and my very own product key. Here is the problem: ...
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2answers
161 views

I can no longer access the BIOS (Computer Freezes)

I have a new Lenovo T440 with Windows 8.1, I have installed Fedora 22 to have dual boot, I started playing around with grub2-customization and some of the BIOS settings (secure boot and legacy vs ...
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1answer
15 views

window installation with usb

two days ago I bought samsung laptop I don't know Korea language Therefore I want to replace another window with English language I want to replace new window 8.1 with usb but it cann't boot how to ...
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2answers
251 views

How can an OS change the boot order?

On a machine that uses UEFI and GRUB to boot I've witnessed Windows decide to change the boot order. I thought boot order was only the business of me and my motherboard and simply non-existent in the ...
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0answers
35 views

windows 7, UEFI, and GPT woes [duplicate]

This might end up being a bit of a long question, but here it goes. I have a desktop PC that runs windows 7. A couple of years ago, I had my main drive die (C drive). I bought a brand new disk and ...
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3answers
3k views

Unable to boot Windows 8.1 UEFI USB key on XPS 13 2015

I have an XPS 13 Developer edition on witch I try to install Windows 8.1 I have already done that on others computer always with success. But I am unable to do so with this XPS. I use Rufus to ...
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0answers
375 views

Update Realtek UEFI UNDI Driver

I have a ASUS J1900 motherboard with UEFI BIOS (Realtek UEFI UNDI Driver v2.023). I downloaded archive with RtkUndiDxe.efi v 2.035. How can I update bios?
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1answer
267 views

can't enter UEFI Boot Manager on Dell R610

This system seems to have a hybrid BIOS / UEFI setup. Before doing anything, I reset the NVRAM of the machine using the Clear NVRAM jumper on the motherboard.. I can get into the BIOS, and I have ...
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3answers
389 views

Cannot restore Windows Backup Image made in Windows 8.1

I have the following Situation: Laptop is EliteBook 840G1 with 256 GB SSD (Crucial M550). Windows 8.1 with Update has been installed without CSM. I made a Backup using Windows' System Image Backup ...
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1answer
296 views

Fixing hidden recovery partitions that use UEFI

Many name brand Windows 8 computers now use UEFI and have partitions to allow for refresh and reset of Windows. Many of which I have had issues with the reset / refresh / and troubleshooting options ...
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0answers
87 views

bootable USB key cannot boot in legacy mode?

I used the netbootin to generate a Mint 17.1 live USB on a EFI kubuntu system. It can be boot in computer with UEFI mode. However, if I change to legacy mode, the live USB cannot boot at all. Is ...
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1answer
146 views

Can Linux OS Boot off MBR in Native UEFI?

While UEFI & GPT go together, I was wondering if Linux can be instilled and boot off MBR Partition type while in Native UEFI Mode?
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1answer
957 views

Does UEFI potentially leak encryption keys?

I just built my first computer in years and for the first time I now have an UEFI mainboard. I installed Windows 7 in legacy mode and encrypted my system partition with Truecrypt. Recently there was ...
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2answers
4k views

How to delete OS from boot menu

After installing fedora and Centos and other OS now I have them all showing in my Boot menu [F2] on start up not the menu form the OS even after deleting them and reinstaling other OS - Ubuntu -so It ...
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1answer
1k views

Windows 8.1 will not boot (HP Stream)

When I power on the laptop I'm greeted with a blue screen that reads, among other things: The operating system couldn't be loaded because the HAL is missing or contains errors Thankfully I can ...
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0answers
304 views

Debian 8 Installer (partman) doesn't detect Hard Disk Drives on Ultrabook, but all other linux commands (fdisk -l, lsblk…) does detect

I'm installing Debian 8.0.0 and 8.1.0 (both amd64) on a Ultrabook (Dell Inspiron 14z 5423) which has both a SSD and a SATA HDD. During the install, when it asks for partitioning, I choose "manual" ...
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0answers
81 views

My bios is not showing up on bootup

My Windows 7 was crashed so I tried to to boot windows 8 from usb and in bios settings I went to advanced tab and in that I just selected (USB-name)UEFI boot and then my laptop restarted automatically ...
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1answer
228 views

Can't install Linux on HP laptop - install can't see mSata SSD + HDD combo

I have an HP ENVY TouchSmart Ultrabook 4-1119tu that came with Windows 8.1, and I'm trying to add Debian Jessie in a dual-boot configuration. PREPARATION I made space on my hard-drive using a ...
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0answers
569 views

Hard disk does not show any Partitions during windows installation

I have a samusung laptop 365e which ive been using for over a year now, it's been working well but it started freezing all of a sudden during it execution. it then finally refused to boot but instead, ...