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

learn more… | top users | synonyms

3
votes
0answers
52 views

Laptop not booting from any bootable device (UEFI broken?)

I was trying to install Debian in a dual boot with the already installed Windows 10 on my laptop. Now when I boot up the PC it shows the Dell logo and the options to press F2 for Setup and F12 for ...
3
votes
0answers
191 views

Installing Windows 10 on a Samsung 850 EVO SSD gets stuck at “Copying Windows files (0%)”

Recently, I acquired a Samsung 850 EVO 120 GB SSD to use for OS (Windows 10) installation. After creating a bootable USB installer (using Rufus) and booting from it, I can do the following things: ...
3
votes
0answers
72 views

A UEFI entry is corrupt. How do I fix it?

I uninstalled Windows 10 from my triple boot setup to be left with dual boot but the UEFI entry for it stayed after I removed the drive, so to remove it I used easyUEFI to remove the entry but it just ...
2
votes
0answers
103 views

Installing Windows 7 via USB gives “CD/DVD drive device driver is missing” error

Apparently a lot of people have had this problem but I've tried all their solutions and came up with nothing. I'm trying to install Windows 7 64-bit SP1 via USB on an ADATA SP550 SSD with an ASUS ...
2
votes
0answers
142 views

SSD causes UEFI to load very slow on reboot (~15 sec)

I've recently bought an ADATA Premier Pro SP900 128 GB M.2 . It works fine , it's fast , but I have one issue with it . When I start the laptop , UEFI loads fast in a second or so , goes to my ...
2
votes
0answers
63 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:...
2
votes
0answers
231 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 ...
2
votes
0answers
606 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 ...
2
votes
0answers
1k views

Boot from CD using UEFI instead of BIOS

I have a Lenovo IdeaPad Y510P. This is my last attempt at recovering my computer, as my recovery partitions are gone and I cannot boot into my computer otherwise. I have Windows 8 x64 OEM installed. I ...
2
votes
0answers
641 views

Extract Samsung OEM recovery from laptop HDD

I have a Samsung NP540U3C with Windows 8. I recovered it to factory condition, booted and it was fine. There were 107 Windows updates so I downloaded and installed them, rebooted and then I was ...
2
votes
0answers
2k views

how to disable hard drives in UEFI bios?

sometimes I need to disconnect a hard drive. I have to open my computer and unplug the sata power cable. I am wondering if its possible to disable the hard drive in UEFI bios. I am using asus p8p67 ...
2
votes
0answers
2k views

Tails “clone” LiveUSB wont boot

I'll try to be as clear as possible. I did install Tails to a USB, then I cloned it over another USB and thats where the problems started. The "clone tails usb" won't start in my laptop. I did try ...
2
votes
0answers
1k views

Dual Boot Windows (any Version) + Linux (any Distribution) with GPT/UEFI, full system encryption and shared partitions

I didn't think that my requiremetns were too special, but my search really didn't yield too many results, so I still got some quesitons unanswered. Basically I'm getting new hardware and will do a ...
2
votes
0answers
532 views

Uefi and full disk encryption with lvm on luks

I have an asus machine on which i can use old bios and new uefi. I've always used the old bios system, running a full encrypted debian with the following configuration: an unencrypted boot partition ...
2
votes
0answers
2k views

Dual boot Windows 7 on pre-installed Windows 8 laptop

I have a newer HP laptop with preinstalled Windows 8. I want to dual boot Windows 7 with it, but am unable to boot to the USB. To start with, I downloaded an .iso from Microsoft that I then copied ...
2
votes
0answers
664 views

Having problems with booting GRUB for EFI on USB stick

Whatever I do, it constantly drops me into the 'bash prompt'. Never displays a menu, nothing. I'm running GRUB on a USB stick formatted as msdos (so, FAT) and when I boot into it, GRUB simply won't ...
2
votes
0answers
1k views

Is the default Windows 8 UEFI/GPT Partition Scheme necessary?

I'm installing Windows 8 on a UEFI computer with a GPT drive array (RAID 0), and whenever I try to create a new partition the installer creates additional partions according to the default Windows 8 ...
2
votes
0answers
245 views

System does not work anymore after migrating to UEFI

I have recently updated my BIOS to UEFI (big mistake...). When I boot in Windows 7 x64 now, it does not recognize any USB driver (even mouse and keyboard).I tried to use Windows Repair Disc to Restore ...
2
votes
0answers
371 views

Windows 7 EFI Partition Deleted

I converted my Windows 7 GPT disk to dynamic, which resulted in it being unable to boot. So I used EaseUs Partition Master on my second Win 7 installation to convert the disk back to basic. Now, I ...
1
vote
0answers
6 views

What is writter in the EFI partition ? In details

I have a HDD(called HDD1) with some partitions such as EFI partition and windows 10 partition. I have another HDD (called HDD2) with only a EFI partition and windows 10 partition. I would like to ...
1
vote
0answers
41 views

Time difference on dual boot system (Windows 10 and 16.04)

I have a dual boot UEFI system with Windows 10 and Ubuntu installed. I have a problem related to the representation of RTC in the two system. Since I have read (on AU and some other sources around ...
1
vote
0answers
29 views

Why can I boot from a USB device without “making it bootable”?

It seems like you can boot from a USB device without a bootloader to me. Even my 6 years old computers that still have a BIOS. From what I read the BIOS simply looks for an mbr, loads it and ...
1
vote
0answers
32 views

Unable to enter UEFI config menu at boot

I am unable to get into the UEFI firmware setting menu at boot time. Symptoms include: None of the F1/F2/.../F10 hotkeys bring out the UEFI config menu. Escape and Del only bring out a useless ...
1
vote
0answers
4 views

Recovery partition for identical OS

I have a recovery partition installed and would like the ability to choose which OS to use the recovery for. There are 2 copies of windows 10 installed and one copy is a duplicate of the other. I was ...
1
vote
0answers
110 views

several minor issues intsalling Fedora 24 to an external USB drive

Most of my computers are UEFI, so I had the idea of, instead of dual-booting each one, installing Fedora 24 to a removable USB hard-drive, and having one Fedora installation that I could use on any ...
1
vote
0answers
52 views

How can I move Windows 10 bootloader (GUID) only to SD card?

I have been trying to upgrade my laptop from a AHCI SSD to a much faster NVMe SSD without much success. I've pretty much concluded that my six month old Dell XPS 13 9343 doesn't have BIOS support for ...
1
vote
0answers
56 views

Trouble with mouse pad after installing/booting up Ubuntu 16.04

So I just received on old laptop from a friend and currently trying to install Ubuntu 16.04 LTS on the laptop. Here are the specs of the laptop: Brand: ASUS Memory: 2.8 GiB Processor: Intel Pentium(R)...
1
vote
0answers
22 views

Can EFI/UEFI theoretically steal LUKS password?

I usually keep my data private by encrypting the whole hard drive. My previous notebook had BIOS, without UEFI. I have bought macbook, want to install linux in dualboot there. So I wonder if EFI can ...
1
vote
0answers
95 views

bitlocker on/off after uefi flash and recovery key has changed?

Amendment: I noticed that though, BL is turned off, that when I try to use recovery options in Windows 10, or when I turn off and back on the TPM in UEFI, that the BL "recovery key" from the original ...
1
vote
0answers
90 views

Why can't I boot in UEFI Mode?

I just upgraded my computer from a HDD to an SSD. When I boot my computer with the new SSD, it must be in the legacy boot mode, or it will fail to start. My old drive was UEFI, but now that option ...
1
vote
0answers
56 views

Starting a custom UEFI application from Windows Boot Manager

Is it possible to make a boot menu entry in Windows Boot Manager BCD to start a custom (signed) UEFI application like, say, GRUB or Intel's UEFI Shell? What are the relevant bcdedit commands? It is ...
1
vote
0answers
133 views

Triple-boot: OSX, Linux, & Windows with full disk encryption

I have a Macbook Air (MacBookAir6'2) that I want to set up a triple-boot on: Required Operation Systems: OSX (10.11.3) Linux (Debian based: Elementary or Mint) Windows 8.1 Pro The 2 main ...
1
vote
0answers
437 views

How to Using Metro Boot Manager on UEFI BIOS when Dual Boot with Linux

I have a problem when trying to set up dual boot (Windows 10 + Linux Mint 17) in UEFI mode or on a GPT disk. I cannot go back to using the default Windows 10 boot manager? In Legacy mode or on MBR ...
1
vote
0answers
813 views

How to do UEFI+GPT with a iso file greater than 4GB

As I understand the only way I can reformat my laptop which is gpt+uefi by default is if I crate a bootable usb that is also gpt+uefi. However the image file that I have is greater than 4GB and RUFUS ...
1
vote
0answers
59 views

Windows 10 boot error

I recently created a bootable USB it using Rufus on a Windows 10 laptop in order to install Windows 10 add alongside Ubuntu for a dual boot on my desktop. I created the USB in Fat32 format. My empty ...
1
vote
0answers
24 views

Zotac Nano uses lots of power while on standby and accesses USB stick - why?

I have a Zotac Nano mini PC with a UEFI firmware here. I have noticed that when on "standby" it consumes a few Watt of power. To illustrate: We start with the power supply disconnected (the power ...
1
vote
0answers
154 views

Why does the FreeBSD kernal crash on UEFI boot?

I recently downloaded the FreeBSD 10.2 distribution from the official website; I used the 'FreeBSD-10.2-RELEASE-amd64-uefi-memstick.img.xz' file. I used MS ImageWriter to image a USB and proceeded to ...
1
vote
0answers
299 views

UEFI-Implementation-Issue (can lead to a hard-brick) - ASUS Zenbook UX303LA-R4342H

Question-State: solved (not really but it basically works) Edit (Current-Progress): ASUS released a new "BIOS-Update" (BIOS 210; Update FW) which fixes the "BIOS-Settings" issues, but I'm not sure if ...
1
vote
0answers
412 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 ...
1
vote
0answers
236 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 ...
1
vote
0answers
411 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 ...
1
vote
0answers
202 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 ...
1
vote
0answers
96 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 ...
1
vote
0answers
83 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 ...
1
vote
0answers
663 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, ...
1
vote
0answers
32 views

Asus Access BIOS Windows 8 Instructions

For these instructions to access the BIOS from asus, when accessing the advanced startup do I need to be admin?
1
vote
0answers
61 views

UEFI multi-factor authentication on admin password?

Many UEFI vendors offer boot and Admin passwords for a local machine. For a normal cold boot or reset, I would like the UEFI system to simply pick the properly signed bootloader and proceed. Having ...
1
vote
0answers
221 views

Dell E6410 UEFI

I'm having problems with my laptop using UEFI. What happens is, I can boot a UEFI operating system only if I go into boot options and manually select it. It will not automatically boot into any UEFI ...
1
vote
0answers
118 views

Unable to enter UEFI with on boot (With F2/F12)

Symtom is somewhat like this. BIOS is broken (?) I can still enter UEFI Setup using efibootmgr -n on Linux, however press F2 according to what shown on the screen does nothing. Same for F12 (that is ...
1
vote
0answers
2k views

Booting SD card from UEFI

I've come across the problem. I'm trying to boot a bootable SD Card using UEFI. However, this doesn't work, as there is no "SD Card" boot option AFAIK. I have tried putting all the USB-related ...