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
0answers
10 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
17 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 ...
5
votes
1answer
556 views

Why isn't rEFInd shell loading?

Because of a two-steps deep problem, I need to boot into an EFI shell and run gptsync. I downloaded the flashdrive binaries of rEFInd 0.7.4, used dd to write the image to a thumbdrive, and it seems ...
0
votes
1answer
3k views

Fedora 19 (you have not created a bootloader stage 1 target device)

I want to install fedora 19 to my HDD but I get errors: you have not created a bootloader stage 1 target device sda6 must have one of the following disklabel types: GPT. I tried: Create 1-2 mb ...
0
votes
1answer
807 views

EFI partition malware?

I have a 2011 Macbook Pro, running 10.8.2 and was worried that the laptop may have been tampered with while left unattended for a few days while abroad in Asia. I have mounted my EFI partition using: ...
0
votes
1answer
75 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
3k views

What is the correct way to install linux on a Macbook Pro

I've had a lot of trouble doing this. It always is unable to boot after installation (I get the famous question-mark in a folder thing). I've installed http://www.rodsbooks.com/refind/ however after ...
11
votes
4answers
9k 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 ...
0
votes
1answer
2k views

How to edit the Boot Graphics Resource Table / Edit windows 8 BOOT LOGO?

I want to edit the screen which is displayed when windows 8 (starts) loads (/loading). As for now it has the Toshiba logo, I want my custom logo or the windows default logo. I have found that UEFI ...
3
votes
4answers
20k views

How do I mount the EFI partition on Windows 8.1 so that it is readable and writeable?

Here is what I do: restart machine with Windows 8.1 determine "EFI System" parition with the Disk Management utility run command prompt as administrator type diskpart type select disk 0 then select ...
0
votes
1answer
91 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
1answer
103 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 ...
8
votes
2answers
2k views

How to get rEFInd working with FileVault 2 on OSX 10.8

I installed rEFInd on my new Macbook Air which I planned on using to do a dual boot to Linux, but prior to installing Linux, I decided to encrypt my drive. I knew I was going to do this, so I had ...
0
votes
0answers
76 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: ...
2
votes
5answers
14k views

Is there a list of available boot-args for darwin / OS X

In OS X you can set boot parameters with nvram boot-args=[options] Where the options I know about -v (verbose) -x (safe mode) and arch=x86_64 (boot into 64 bit kernel on 64 bit capable machines). ...
0
votes
0answers
81 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
409 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
79 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
1answer
394 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 ...
8
votes
2answers
8k views

Tools to modify UEFI Variables in Windows/Linux?

I have a DELL machine that use Phoenix SecureCore Tiano as its UEFI/BIOS However, it is totally not configurable as its UEFI shell & menus are hidden in BIOS Setup. I'm wondering if there were ...
0
votes
0answers
571 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
31 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 ...
4
votes
1answer
7k views

How do the 'EFI system partition' and UEFI *.efi files relate?

I read that there needs to be an EFI system partition. The EFI System partition is a partition on a data storage device that is used by machines that adhere to the Extensible Firmware ...
1
vote
0answers
43 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
220 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
40 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
56 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
724 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 ...
1
vote
1answer
605 views

Is the EFI partition and GPT necessary with less than 2 TiB?

I have a 1 TB external USB hard drive that is GUID partitioned with a 100MB FAT32 EFI partition. The thing is that its a 1 terabyte drive. From what I'm aware, the limit is at 2 tebibytes (TiB). ...
0
votes
0answers
39 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
763 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 ...
14
votes
1answer
2k views

What hardware device used to eat up 1.4GB of my 4GB RAM, and now suddenly after no hardware changes eats up 2.2GB?

This is more or less a continuation of What hardware device eats up 1.4GB of my 4GB RAM? While I have more or less accepted the solution there that for some mysterious reason, after a BIOS upgrade ...
1
vote
1answer
473 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?
2
votes
4answers
3k views

EFI GPT Windows 7 boot-loader/manager issue and grub

My computer(asus N76VM 64 bit) with windows 7 (64 bit home professional) pre-installed got in a bad state while partitioning from a later installed Ubuntu environment. This had lead me to run testdisk ...
2
votes
2answers
1k views

Update MAC EFI to EFI 2.x

I've been doing a lot of research about installing Windows on Mac - without having a MBR and such. I'm trying to create a pure GPT/EFI system without MBR. Currently, Mac Bootcamp creates a hybrid ...
0
votes
0answers
320 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 ...
0
votes
1answer
1k views

Deleted EFI partition Windows 8

I dual boot windows 7 and 8 and I accidently converted my windows 8 disk to dynamic while I was in 7. I used AOMEI Dynamic Disk Manager to turn it back to basic, but it removed my EFI partition. Now ...
0
votes
1answer
276 views

Repair EFI Bootloader?

I'm aware there are other topics on this subject, but i've tried the fixes to no avail, hence making this post. So I had a 1TB HDD with Windows 8.1 installed along with a partition with a recovery ...
3
votes
4answers
20k views

How to fix EFI-boot on my Macbook Pro after Ubuntu install?

The MacBook does not boot. The screen stays blank (black) – not the grey, active screen like normal. To power off, I hold the power button down. After 5 boot attempts the MacBook finally shows the ...
5
votes
1answer
32k views

How to upgrade Mac Pro 1.1 from OS X 10.6.8 to OS X 10.9 Mavericks?

Upgrading the Mac Pro 1.1 2006 in the standard way using the app store is not possible. This is caused by the lack of the 64 bit EFI bios. The hardware of the Mac Pro 1.1 is already complete 64bit ...
0
votes
1answer
805 views

kali linux efi boot problems

I have just downloaded Kali Linux and used UNetBootin to install it to a 16GB HP V220W.I Followd the instructions in d kali website and created/EFI/BOOT structre and put d files in it. wrote grub.cfg ...
0
votes
1answer
201 views

Install Debian on MacBook Pro Late 2013 with pure EFI

I resized the OSX partition. I installed rEFInd from within OSX. rEFInd works fine. When I try to install debian from the netinstaller, I have the problem, that I cant get up the ethernet interface. ...
2
votes
1answer
1k views

Trying to boot Kali Linux from USB on Mid 2010 macbook pro

I created a Kali Linux Live USB (MBR with compatibility for both BIOS+EFI) and created an /EFI/BOOT directory on the USB's root directory, with the file bootx64.efi in it. However, when I tried to ...
2
votes
2answers
12k views

Windows 8 EFI boot issue

I've got a simular problem as described in How can I repair the Windows 8 EFI Bootloader?, but with some different details. When I tried to change the bootsequence of my harddisks (of which 1 SSD) in ...
0
votes
1answer
155 views

Automount NTFS partition with EFI/GPT

I have a multiboot laptop with EFI and GPTs. One drive is a shared drive formatted with NTFS. I was going to automount it at boot by modifying bits in /etc/fstab. However: # <file system> ...
0
votes
0answers
608 views

Windows 8 Boot process in EFI

I was trying to add Debian 7 boot entry to Windows boot menu using easyBCD. I accidentally deleted the Window 8 entry from the list now I get a BCD error when trying to boot. Error code 0x000098 How ...
1
vote
0answers
151 views

How can I move an Win 8.1 GPT EFI installation to a smaller disk?

which programs do you use to move a whole HDD (GPT EFI Win8.1 installation with the "boot" and "reserved" partition) to a (~10MB) smaller one? I tried "mini tool partition wizard" and "gparted live" ...
2
votes
1answer
2k views

Boot ISO from HDD from UEFI?

I have a Windows 8 To Go Entreprise HDD, which boots both on BIOS and UEFI systems (I'm wondering how that's done, because I need that too). Now, I see the HDD I use for that windows is an MBR HDD, ...
0
votes
1answer
8k views

How can I repair access to the Windows 8 recovery (maybe EFI issue?)

Notebook is ASUS G55VW (1 ssd, 1 hdd) issue is already described here http://rog.asus.com/forum/showthread.php?28454-G55VW-F9-not-working-after-restore-WIN-8 to sum: 1. I backuped whole system with ...
0
votes
3answers
896 views

Boot of Windows 7 from GPT disk on non EFI motherboard [duplicate]

Looks like the answer is no but just to double check... Can I boot Windows 7 SP1 x64 from GPT disk (converted with Windows DISKPART) if my system built on BIOS (non EFI motherboard, ASUS P5WDH ...