EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack.

learn more… | top users | synonyms

0
votes
1answer
31 views

How to add Windows to grub?

The following is the list that I got when I executed the command sudo fdisk -l: Disk /dev/sdc: 120.0 Gb, 120034123776 bytes Id disk: 0x975e4baf /dev/sdc1 * 2048 206847 102400 17 ...
1
vote
2answers
29 views

How do I disable digital signature checking for Windows 8.1 EFI files?

I'm trying to patch my bootmgfw.efi file to change the background color of the BitLocker password prompt and other Windows bootup screens. I found the values to search for and replace for the color ...
0
votes
0answers
26 views

Windows UEFI repair

I have an Acer Aspire 571-series laptop that came with Windows 8 preinstalled (now upgraded to 8.1). Last week I installed the OS X Yosemite (hackintosh) to triple boot with Windows and Ubuntu, and ...
0
votes
1answer
14 views

Is there a way to tell whether my EFI bootloader would accept the signature of the binary without reboot?

Assume that I have just installed a signed EFI bootloader (e.g. grub2 from Ubuntu 14.10 amd64 on a Lenovo IdeaPad U410 which can only boot in secure boot EFI or legacy mode) on a machine from within a ...
0
votes
0answers
20 views

Why can't an acer aspire XC-703 turn on without his hard drive?

I received an Acer Aspire XC-703 and i tried to sobstitute the included 500GB hard drive with a 32GB SSD. But the pc won't even turn on (power led off, cpu fan stuck at max rpm, no video output) when ...
0
votes
0answers
16 views

How to create a bootable media from an .swm ASUS image file (set)?

After overwriting the EFI setup of a Windows 7 64-bit with a change of partition table (from msdos to gpt including copying partitions with dd from backup image) and installation of grub2 in a ...
0
votes
0answers
112 views

What is the C:\EFI folder on Windows 10 Technical Preview and should a user be able to modify it?

I have not seen a folder named C:\EFI before, but I was wondering why the default permissions are not more restrictive. Every user could just delete that folder. What is this folder and is it ...
0
votes
0answers
16 views

WIN8 EFI GPT hdd does not boot

I have followed instructions here to test GPT and EFI partitions. all scripts from website works fine in winPE but after reboot, computer does not find hard drive bootable. At first I thought i need ...
-1
votes
2answers
49 views

How to register/convert a restored linux OS (bios) to EFI booting

First let me explain my current set up. I recently scrubbed my two main drives and converted them to GUID. On the primary drive (sdb in my case) I have created an EFI boot partition (ESP) on ...
0
votes
0answers
100 views

How to install windows 8.1 using OEM provided install.wim and boot.wim

Unfortunately, recently, my C drive got corrupted and I had to format the whole partition and reinstall the untouched windows 8. There are 2 recovery partition in my laptop which includes install.wim ...
0
votes
2answers
26 views

UEFI ESPs and multiple disk drives

I have added a usb connected SSD (sdb) to my (originally Win8) UEFI Toshiba laptop...I am EFI multi-booting via GRUB2 just fine on my laptop HDD (sda)...I have installed a Manjaro KDE distro on the ...
-1
votes
2answers
722 views

How to boot Acer Aspire Switch 10 from external media?

I have an Acer Aspire Switch 10 and I want to boot with a USB stick or a DVD-reader. I only can boot with a Windows 8 instal disk in it, having an EFI file on the DVD. With a recover USB stick (made ...
0
votes
0answers
256 views

Linux Mint Installation : EFI Partition

I tried to install Linux Mint 17.1 MATE 64-bit edition on my asus laptop, which had installed Windows 8.1. I put CSM (Legacy BIOS) enabled, Secure Boot disabled, and boot with my Live CD USB (created ...
1
vote
2answers
37 views

2 additional partitions next to windows 8

so im trying to move my windows to different disk without harming them, and suddenly I found those two partitions in my disk: Can I just delete them or are they something important? from what I ...
0
votes
0answers
92 views

Moved Windows partition to the left, won't boot (EFI)

I'm at my wits' end with this problem. I've searched all over, but can't find a solution. I'm fairly new to Linux, and not an expert with computers generally, but having been messing around A LOT ...
0
votes
1answer
26 views

EFI partition not found

I’m instaling Debian in a laptop that already has Windows 8 installed. Everything went right but when I finish the partioning, a message says: EFI Partition not found, do you want to continue? ...
-1
votes
1answer
139 views

Debian + 4TB SATA + md RAID - Grub won't install, or if it does, won't boot

I'm trying to get Debian 7.8 amd64 setup on an system (G3220 CPU, mobo is an Asus H81I+) onto which I've installed two 4TB SATA hard drives. I admit I'm not up to snuff on EFI and such. My goal is ...
0
votes
0answers
49 views

Can I take out the HDD of an EFI/iCloud password protected Mac and clone it?

I have a situation in which I have Macs with an EFI and iCloud password protections, and I just need to clone the data in them (data far outweighs the device price), and I read somewhere that removing ...
0
votes
1answer
237 views

installing 32-bit windows: diskpart convert mbr error

I have an efi-based 64 bit system with win 8 pre-installed. I want to downgrade to 32-bit win 7 and so I booted up a bootable win 7 usb and opened command-prompt with shift+f10. I used convert mbr ...
-1
votes
2answers
81 views

replace efi firmware with old legacy bios?

So I bought a new laptop with 64-bit windows 8 pre-installed, and in preparation for downgrading to win7 32-bit, i've been reading about EFI and MBR etc.. It seems like the firmware which boots disks ...
0
votes
1answer
113 views

How do I convert an EFI System Partition into a normal GPT partition?

I had a Windows 8.1 that required a re-install. In the process, my 4TB secondary disk is now showing up in Disk Management as an EFI System Partition, with no volume. In DISKPART, a volume is shown, ...
0
votes
0answers
113 views

UBUNTU- How to fix windows boot configuration data when using

recently i used gparted to resize my partitions for windows 8 and ubuntu. Ever since then I have not been able to get onto windows 8. When ever i try clicking on the windows boot option (say is it on ...
0
votes
0answers
279 views

How can I place /boot/efi on a different drive than / and /home?

I am trying to install Fedora 21 onto a relatively recent Toshiba laptop. Due to firmware problems, I cannot alter the existing EFI partition. Therefore, I need to install /boot/efi on external media. ...
1
vote
0answers
92 views

Windows 8.1 EFI Graphical Bootloader: Change OS Thumbnails

I've just used EasyBCD to tweak my Windows 8.1 EFI graphical bootloader, adding entries for Windows XP and Ubuntu. Both of them have a boring thumbnail of a window, while Windows 8 has a thumbnail of ...
0
votes
0answers
136 views

Modify UEFI Windows Boot Loader

I have installed 2 systems on my ultrabook Asus UX32VD. I use Windows 8.1 x64 - on first SSD disk and Kali Linux (security distribution based on Debian) - on second SSD disk. I have fully encrypted ...
1
vote
1answer
70 views

Windows 8.1 upgrade blew out other OSes on GPT disks?

I was multibooting an EFI laptop. The laptop was using GPTs, was using SecureBoot, and it had Windows 8.0, Ubuntu, Fedora and Debian on it. I updated the laptop to Windows 8.1 through the free App ...
0
votes
1answer
122 views

ArchLinux on MacbookPro 5.3 EFI single boot with hfs-bless

I want to try to install ArchLinux on my macbook pro 5.3 with EFI support, i don't want any other OS but Archlinux. but i am unable to convince Apple firmware to load my custom efi image. What i have ...
0
votes
1answer
383 views

Bios not recognizing USB in EFI mode

I got a brand new Laptop with pre installed windows OS i wanted to do a clean install Okay so this is what i did i created a bootable USB of windows 8.1 Pro. Then i booted my laptop which was by ...
0
votes
0answers
115 views

Boot menu in Asus efi bios utility shows old boot entries

So I decided to reformat my computer today and I formatted my harddisk but when I went back into the bios/efi I found that it had entries to "Windows Boot Manager", "Linux Mint" and "grub". Even when ...
0
votes
0answers
42 views

Can I repair EFI partition (Windows 8.1) from another Windows 8.1 Internal Hard or Ubuntu (Triple-Boot)?

I have a home-made Desktop PC with 2 Windows 8.1 (1 for Gaming, 1 for Regular work) and 1 Ubuntu. So last time I renamed my Gaming Windows from "Windows Boot Manager" to "Windows 8.1 Gaming" with ...
0
votes
1answer
1k views

Cannot EFI boot from Clonezilla disk image

I have created a Ubuntu Server 14.04 system that I would like to clone to several other machines with exactly the same hardware specifications. The system is an Intel NUC2820 with 30 GB SSD. The ...
0
votes
1answer
490 views

safe to delete EFI system partition (win7) on old drive after cloning?

a while back I cloned my old installation of win7 from my HDD to a new SSD using the tools provided by Samsung (if I remember correctly). I know I should have done a clean new install, but that's not ...
0
votes
0answers
167 views

Caution: invalid backup GPT Header (gdisk)

Each time I boot into my Ubuntu installation, when I open gdisk I am given the messages: GPT fdisk (gdisk) version 0.8.8 Type device filename, or press <Enter> to exit: /dev/sda Caution: ...
0
votes
0answers
181 views

Is It Possible to Change BIOS on a graphics card to EFI?

I'll be using a PC graphics card in my Mac, but I know that there won't be a boot screen because PC graphics cards use BIOS instead of EFI. Is it possible to replace the graphics card's BIOS with EFI ...
0
votes
0answers
693 views

winload.efi error code 0xc000000f

I just ran into a really strange problem with my new Surface Pro 3. Everytime I install the [september driver pack from Microsoft the device won't boot anymore (screenshot). The windows 8.1 is a vhd ...
0
votes
0answers
178 views

ASUS M5A97 EVO R2 linux flash drive boot issues

I have a FX-8350 with a M5A97-EVO R2.0 motherboard. I'm not able to boot an arch linux nor an openSUSE 13.1 USB flash drives. Both are able to show the booting menu (gummiboot on Arch and GRUB on ...
0
votes
0answers
974 views

How to add EFI entry by efibootmgr?

I installed stand alone Ubuntu on my laptop by formatting the HDD. Now HDD is not in my EFI menu. From a Live USB environment, I added the EFI entry, even by chroot. However, the EFI menu is reset to ...
0
votes
0answers
73 views

Boot Lubuntu on usb by reusing the boot function of an application? (in this case: DiskWarrior)

I have tried a lot of different stuff to get Lubuntu installed on my Macbook 1,1 (first Intel macbook). I just won't get a usb to boot. For the sake of comparison, it does work on my new Mac Mini ...
1
vote
0answers
75 views

Multi-boot encrypted operating systems on EFI

I'm getting ready to "redo" my desktop computer, encrypting all of my partitions as I install the operating systems. I currently boot with EFI. I'm looking to install both Ubuntu 12.04 (really ...
0
votes
1answer
733 views

Cannot boot on windows 8 after installing Scientific Linux 6.5

I had a standard toshiba latop (2014 model with EFI), which came pre-installeed with windows 8.1 and I tried to install Scientific Linux(SL) 6.5 in dual boot mode. Originally, I couldn't install it as ...
0
votes
0answers
48 views

Install Windows 8 on different partition than EFI

I've the following partitions: I want to install Windows 8 on /dev/sdb3, but how can I make sure that Windows will use the EFI partition on /dev/sda1? I'm afraid that Windows will create its own ...
1
vote
1answer
77 views

Can't install Windows on GPT device

I have a bit of a conundrum here. My windows installation doesn't boot with EFI, so the only way to boot from it is to turn off efi boot on my BIOS settings. Then I can boot into the disk, but my ...
0
votes
1answer
252 views

Is it possible to bypass the 5-second delay in EFI shell?

Due to my unusual hardware configuration, i am forced to set two PCI registers using the mm EFI command before being able to boot Windows. Right now i have a build of the EFI shell (my mobo does not ...
0
votes
1answer
995 views

Use shim with UEFI Fedora 20

How do I use shim with Fedora 20? I have the KDE version, if you need to know that. Running kernel 3.11, with secure boot enabled. At boot, this message is shown: EFI: Problem loading in-kernel ...
0
votes
0answers
46 views

No boot entry in msconif boot tab

I bought a new lenovo laptop with a micro-ssd slot. I bought a ssd disk from amazon. I installed windows 8.1 on the ssd and used the regular disk as data storage. The computer runs fine. However I ...
0
votes
1answer
930 views

UEFI - Linux Mint Boot from USB Doesn't work

I'm running Linux Mint (only OS other than in VirtualBox) and wanting to remove it. I've created a Live USB of Windows 8 using Windows 7 USB/DVD Download Tool - Yes, I know it says Windows 7 but I've ...
1
vote
1answer
669 views

How can I reset my BIOS password on my Acer W3 810 Tablet

I set a BIOS password on my Acer W3 810 Tablet and then forgot the password. How can I reset my BIOS password?
0
votes
1answer
386 views

How to log into Windows if I have deleted the EFI partition?

I've run into a problem while experimenting. I deleted my EFI partition while installing Ubuntu. I had Windows 8.1 pre-installed. I installed Ubuntu 14.04 LTS. Ubuntu runs fine. But there are no ...
0
votes
0answers
415 views

Are there any rescue CD's which are bootable on UEFI and or UEFI with Secure Boot enabled?

I'm looking for Rescue CD's like Hiren's Boot CD which allow me to boot without switching to BIOS or turning off Secure Boot. I had no luck finding such thing. Is it even possible to launch such an ...
14
votes
4answers
19k views

Hiren's Boot CD with UEFI support?

I am a long term user of Hiren's Boot CD, but the CD does not support booting on UEFI/EFI/SecureBoot hardware, is there some kind of update/patch to apply to the cd image to be able to boot without ...