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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How can I completely remove Windows 8.1 so I can install CentOS 7?

I am trying to install CentOS 7 from a USB flash drive, but the boot sequence keeps ignoring the USB flash drive, even though the USB flash drive is listed as the first item in the boot sequence. So ...
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1answer
17 views

Booting from Xubuntu 15.04 installation media hangs when booting with UEFI

I want to dual boot my laptop with Windows 10 and Linux. I'm attempting to install Xubuntu 15.04 x64 but when I boot from the installation media it hangs on starting version 219 then eventually my ...
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0answers
25 views

How to install Ubuntu on Asus X550Z? [on hold]

This laptoop has UEFI. I've removed Windows, I created bios-boot partition, turn off safe boot, used Boot-Repair and it doesn't not help.
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1answer
10 views

Cannot boot Elementary OS Freya after installation on a former Windows netbook

Asus X200MA, used to have Windows 8.1 preinstalled (with UEFI). I deleted all the partitions and installed elementary OS. Now, without USB stick plugged in, the computer has no boot options (none ...
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23 views

Will this method of converting a HDD from Legacy to UEFI reset my activation status in Windows 10?

http://superuser.com/a/812063 Also, will Windows 10 backup preserve system's activation status (so I could fiddle with HDD with no worries after possible license loss)?
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1answer
24 views

Make multiboot ISO with EFI support in windows

I currently have 3 ISOs. Windows 8.1 64-bit EFI ISO Debian 8 Network Install 64-bit Ubuntu 15.05 64-bit I would like to make it into a mutiple-distro linux install ISO. It needs to support EFI, ...
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0answers
37 views

Windows won't boot in UEFI mode, issue with the BCD

I received a new Clevo P650SE laptop. The laptop only had a 500GB 7200RPM HDD to begin with, so yesterday I added my Samsung 840 EVO SSD. As I wanted this to now be the primary drive, I made another ...
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1answer
169 views

After installing August 2015 updates, Windows 10 endless loop - light blue BSOD “BAD_SYSTEM_CONFIG_INFO” - that cannot be repaired, reverted, or reset

I made a dumb decision and opted to accept Microsoft's offer to upgrade from Windows 8.1 Pro to Windows 10 "for free," which is only true if you don't consider your time or ability to start your PC ...
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2answers
62 views

How do I install Windows 10 from USB to a UEFI Secure Boot Machine [duplicate]

With a new bare Machine how do I install Windows 10 from a USB stick and install it with secure boot?
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1answer
81 views

Windows 10 Not Booting due to Boot Device not found

I just upgraded from Windows 8.1 to Windows 10 successfully. I think I made a mistake of formatting the old Window 8.1 recovery partition (which was not needed anymore). This was done via the Disk ...
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0answers
21 views

How to create hybrid live USB

I have a laptop running stock UEFI and Windows 8.1. I want to create a bootable live linux USB stick that can be used to boot either my older BIOS system or my newer UEFI system. I am ok with having ...
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1answer
27 views

Can be Windows 8 drive with UEFI boot cloned trivially?

Due to lack of disk space, I need to replace bootable 128 GB SSD drive with 256 GB unit. Is it as simple as creating disk image of drive and restoring it on another drive or should I expect any ...
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0answers
13 views

Replacing my HD with SSD on WIn 8.1 and UEFI

Bought my wife a Dell laptop several months back and decided she needs an SSD for speed. My plan I to pull the drive, rebuild the laptop on the SSD from scratch (and then upgrade to Win 10). Question ...
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1answer
276 views

Enter BIOS from Windows 10 (UEFI mode)

I have Windows 10 installed on my Asus N550 notebook and want to enter the bios to install windows from scratch. (I have to change the boot order). However, I'm unable to get into the BIOS. Usually ...
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0answers
25 views

Virtualization with UEFI'secure boot feature

I'm interested in the notion of emulating digital signature checks in virtual machines—the host can be booted without hardware-based digital signature checks, which can be moved to the VM, and the ...
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1answer
21 views

Are the positions required for UEFI / GPT secure?

I recently manually set up UEFI for my windows install. Today I read an article about Lenovo shipping malware on the UEFI positions of some of their laptops. This got me wondering, is the partition ...
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0answers
26 views

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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0answers
22 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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37 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
21 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
40 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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60 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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0answers
11 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
53 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
67 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
135 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
299 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
86 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
70 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
32 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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2answers
4k 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
39 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, ...
2
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0answers
285 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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0answers
50 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 ...
0
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0answers
29 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
290 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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0answers
72 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 ...
1
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1answer
90 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
113 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.EXE ...
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votes
1answer
119 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 ...
0
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0answers
48 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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0answers
91 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 ...
0
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1answer
58 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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0answers
14 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 ...
0
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1answer
62 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
26 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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0answers
107 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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votes
1answer
56 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
45 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
12 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 ...