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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Cannot boot Windows 8.1 after hard drive crash

I have a pc laptop that was dropped. HP 15-r132wm. The screen was broken and the hard drive was as well. How do I reinstall Windows 8 or Linux on this pc as it boots up to: Boot Disk not Found. After ...
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1k views

Acer E1-510 doesn't recognize thumbdrives or hard drives

I had a hard drive failure in this laptop, and both hard drives I've put in it show up in BIOS, but do not show up in the boot menu. The thumb drives don't show up in either BIOS or the boot menu. ...
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1answer
263 views

Boot from USB/DVD in EFI Mode

I would like to perform a clean UEFI installation of Windows from a USB/DVD. That involves reformatting the disk to GPT and re-creating the EFI sector. My question is: how to boot from a peripheral ...
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147 views

Unable to enter EFI firmware

I have Lenovo (G580 Model 20157) laptop. It had Windows 8.1. I dual booted it with Ubuntu 15.04. I am unable to go into EFI setup since then. I tried that by: Pressing F1, F2, F3, F4, F5, F6, F7, F8,...
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4k views

How do I repair Windows 10 UEFI/GPT disk which is left unbootable after deleting partitions?

I recently upgraded from Win8 to Win10. The Win8 machine was in a dual boot with Ubuntu on an 80GB SSD. After the update and a few other issues I created while messing around with GRUB, I'm now left ...
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62 views

UEFI detection (ESPs)

Does the UEFI boot manager detect the ESPs inside the GPTs on every storage device, based on the global-scope variables (boot-configuration) stored in NVRAM? Reading the UEFI booting from Wikipedia:...
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415 views

stuck after first reboot with UEFI clean install of Windows 10

Install with media from MS MCT Win10pro x64 from a SD-Card slot. Did a fresh GPT partitioning of 128 GB SSD as from Win10´s choice. after the first reboot it stucks at the blue windows logo, but ...
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1answer
572 views

UEFI & legacy PXE chain to WDS

I'm making a PXE server (CentOS 7) that will be able to boot legacy and UEFI clients, so far this works fine, but i also want to be able to boot into WDS via the linux PXE, I was somehow able to make ...
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2answers
135 views

Boot Windows directly through Grub2

I have an UEFI multi-boot system with Windows 7, Windows 10 and OpenSUSE. Currently when I want to boot Windows, I first need to select Windows Boot Manager in Grub2, it then chainloads the Windows ...
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1answer
847 views

Change the keyboard layout of GRUB in stage 1

I installed grub on a EFI based system. So I have the EFI partition on /dev/sdc2 and my LUKS container in /dev/sdc5. I have only one linux partition in the LUKS container. So even /boot with the stage ...
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1answer
949 views

Dual booting Ubuntu with Windows 10 - UEFI USB not booting

I have never had issues dual booting my Windows machines with Ubuntu (pre Windows 10). I made my bootable USB, started working through the Ubuntu live installer but when it came time to allocate disk-...
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1answer
32 views

UEFI but not booting directly

I was playing around with my partitions finally now it doesn't boot directly. For it to boot I need to go to HP boot menu and then choose EFI file to boot to load the OS. Something like EFI partition ...
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1answer
59 views

secure boot - runs fine with .cer - fails with .crt certificate

I have Asus X200MA notebook with Windows 8.1 64bit. I have setup shellx64.efi to run under secure boot. File is signed with my own key (created using openssl) and it runs fine when .cer format ...
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1answer
3k views

After upgrading to Windows 10 from 7 is there a way for you to disable CSM

I was until recently running Windows 7 on my PC, I upgraded to Windows 10 and I know that it can support full UEFI (i.e. with CSM disabled). I believe my PC will be better with CSM disabled, so I ...
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2answers
69 views

Bootloader, uefi, bios documentation

I'm facing incredibly annoying issues with installing kali 2 (not booting + completely messing windows 7 boot) in uefi mode. I went trough alot of topics and solutions and nothing seems to work, ...
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0answers
373 views

Windows 10 UEFI Install on Hp Envy 14 - 1190ea

I'm trying to install Windows 10 and boot through UEFI instead of Legacy BIOS on my HP Envy 14 1190ea. For the installation I have created 3 USB sticks with rufus: The first was configured as "MBR ...
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1answer
804 views

CentOS 7: How to support a 3tb, 4tb, or 5tb drive, as a single partition, without UEFI

My CentOS 7 server is running on a system that is non-UEFI and I need to clone a 500GB HD to a 5TB HD to be used as the new boot drive. What is the cheapest, least time-consuming option to support ...
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384 views

Is there a way to select a custom ROM for virtual machine in Virtual Box?

Using QEMU it is straightforward to select different ROMs either as the main ROM or as a peripheral ROM (i.e. video or network card). Is there equivalent functionality in VirtualBox? I am aware of ...
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1answer
117 views

Cannot get my bootable media to boot on my laptop

My laptop: Acer Aspire Switch 10E My processor: Intel Atom Z3735F (64 bit processor) Came pre-installed with 32 bit windows 8.1 now upgraded to windows 10 I believe this laptop has a 32 bit UEFI ...
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1answer
394 views

can't seem to access uefi bios on windows 10

I have an HP desktop and got windows 10 through the free upgrade promotion, but unfortunately I can't run my new evga GTX 750 TI SC. I heard it my be due to the bios but I've looked everywhere and ...
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1answer
233 views

Installing Ubuntu 15.05 alongside Windows 8.1

I've been trying to install Ubuntu 15.04 alongside Windows 8.1. Windows 8.1 is currently installed, the computer has two drives, both of which (as near as I can tell), use GPT. The first drive is an ...
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102 views

Can't create an AVD in both Android Studio and Eclipse

When I try to create an AVD in Android Studio, it always displays this message: "HAXM is required for running x86 system images". I tried installing HAXM from the SDK manager and separately as well. ...
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1answer
203 views

Install GNU/linux distro on UEFI enabled laptop without using windows

Like the very flawed thing it was designed to be, UEFI is causing me some some serious problems. Allow me to begin. I have an HP pavilion 4540s laptop. It originally came with windows 8, I got it ...
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494 views

How can I do a dvd install of CentOS 7 that also removes Windows 8.1?

I am trying to install CentOS 7 as the sole operating system on a computer that currently has Windows 8.1. However, I am experiencing a long series of obstacles when trying to use boot sticks to do ...
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1answer
154 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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1answer
709 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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47 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
230 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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219 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
9k 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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2k 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
6k 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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1answer
148 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
75 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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19 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
6k 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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224 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
30 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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61 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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71 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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0answers
356 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
203 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
303 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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238 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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40 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
140 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
705 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
267 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
8k 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
743 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 ...