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.

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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 ...
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23 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 ...
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1answer
32 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 ...
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29 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 ...
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1answer
60 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 ...
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20 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 ...
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1answer
96 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 ...
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1answer
116 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?
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1answer
70 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 ...
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121 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 ...
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1k 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 ...
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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 ...
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1answer
129 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 ...
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1answer
44 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 ...
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1answer
65 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> ...
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176 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 ...
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86 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" ...
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1answer
533 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, ...
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1answer
161 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. ...
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4answers
1k 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 ...
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1answer
260 views

Windows MBR broken after a Windows update

My Windows 7 machine was working fine last night. When I booted it up it installed an update and then I started using it... It hadnt restarted since the install of the update so I didnt notice that ...
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1answer
16k 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 ...
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34 views

Is Firmware Boot Manager critical? Or can it be deleted if you have Windows Boot Manager

I would like to reset {fwbootmgr} because it not linking to {bootmgr} even though in display order Firmware Boot Manager --------------------- identifier {fwbootmgr} displayorder ...
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2answers
451 views

Can i delete {fwbootmgr} and system will defualt to {bootmgr}?

{Fwbootmgr} skips {bootmgr} I used bcdboot C:\Windows /l en-gb /s B: /f ALL from bootable usb when ASUS K55A - HI5014L magically corrupted boot information when multiple f1-12 keys were pressed at a ...
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3answers
224 views

Does there exist a native UEFI disk/partition manager?

UEFI has the infrastructure to support complex applications at boot-time. One of the most urgent needs of the hour is a UEFI application for GPT disk management. A lot of partition management cannot ...
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2answers
174 views

EFI Boot: Two independently bootable physical hard drives?

My computer has two physical hard drives. sdd internal hdd0 hdd internal hdd1 The BIOS (EFI) allows the boot either one. Since I never know when one hdd, especially the ssd, stops working, I ...
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1answer
613 views

Trying to Mount EFI boot partition on Windows 7, getting “parameter is incorrect”

Preamble: I'm in kind of a strange situation here. I recently set up my late-2008 MacBook Pro to dual-boot between Windows 7 and OSX, using rEFInd. However, in the rEFInd menu at startup, I am given ...
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1answer
301 views

Installing windows server 2008 on SSD with GPT and EFI

I recently purchased a new Samsung 840 EVO with a few other components, to rebuild a machine that has been on the verge of extinction. With the SSD purchase, I also purchased a new motherboard from ...
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1answer
642 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 ...
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1answer
801 views

Delete EFI Partition

I run diskutil list and have this schema: /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 ...
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1answer
83 views

Gray Progress Bar in Macbook Boot caused by Partition Fault

Here's my problem: When I try to load my Macbook it shows the gray progress bar. It takes a while to fill the whole progress and after it Macbook just shuts down. I tried to boot from a recovery ...
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1answer
140 views

Looking for a comprehensive/“expert” guide to BCD parameters [closed]

I'm having issues with BCD on Windows 8. I can't find any guides at typical "enthusiast" level covering what each option or argument in a BCD /ENUM dump might mean, and the principles governing how ...
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4answers
9k 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 ...
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1answer
2k views

Unable to start Windows - UEFI boot problems with Linux + Win8

I have installed openSUSE (12.2) on a PC that has Win8 installed. At the beginning there were problems and it didn't start, after some "fixes" Linux started but when going in the grub2-efi Windows 8 ...
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2answers
980 views

Removing EFI partitioning from 3 TB hard drive to restore a default

I just got my WD 3 TB hard drive. I put it in an external dual disk duplicator (max USB3) and partitioned and formatted it GUID with partitions of 2.2 TB and 800 GB. The larger partition was for Time ...
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1answer
351 views

GRUB2 on USB with Ubuntu and Windows 8 Recovery

I have a Surface Pro. I have moved my recovery partition off of the Surface Pro onto a USB flash drive. I have also installed GRUB2 on the flash drive with Ubuntu Live/Persistent (I backed up the ...
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1answer
308 views

Reinstall Ubuntu over Elementary OS IN EFI

First, a bit of background. I managed to dual boot Ubuntu 13.04 with Windows 8(preinstalled). I disabled secure boot. I had to go in the bios settings and change the disk order to select Ubuntu as the ...
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401 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 ...
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1answer
954 views

Dual booting Windows 8 and Ubuntu 12.04 with EFI. Got “error: unknown filesystem” and grub rescue prompt

This is a Toshiba Satellite S855-S5381. Windows 8 was already installed and then I installed Ubuntu 12.04 alongside it. During this process I was informed to make sure to turn off Windows fastboot ...
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1answer
2k 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 ...
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1answer
979 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 ...
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2answers
594 views

Windows 7 GPT to MBR? EFI to BIOS

I want to convert my existing GPT partition table to a MBR one. UEFI is giving me too many headaches with Linux. Actually, I'm just interested in my Windows partition. All the articles on the ...
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1answer
582 views

How to recover files on EFI boot partition

I have a laptop with Windows 7. When I try to install Fedora I delete Efi boot partition. Then I again created it. Then I remove Fedora and now nothings work. How to recover files on EFI boot ...
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3answers
712 views

convert windows 7 to BIOS from EFI

So I got a new HDD, a larger one, and I want to transfer all my 7 stuff to that without having to reinstall. With doing my research I can do this by creating a system image. The only issue is my ...
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1answer
244 views

change Windows8 from legacy to EFI

I have just recently installed windows 8 on my Laptop, and will soon be re-installing Linux alongside. My laptop was running legacy boot-loaders, but supports EFI. I want Windows 8 to use an EFI ...
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1answer
2k 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 ...
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1answer
219 views

EFI partition decision (Windows 8)

Earlier today, I installed Sabayon. After messing around with EasyBCD and a couple other tools, (no permanent changes) I gave up on trying to get it to chain-load, and decided to wipe the Sabayon and ...
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2answers
897 views

Windows 7 in EFI Mode with Debian

Do you have to install Debian in EFI mode if Windows 7 is installed in EFI? I assume its more complicated to install Debian in EFI mode and I don't want to have to go through the process of installing ...
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1answer
530 views

Should I create an EFI Partition In The Debian Installer?

In the Debian Installer after you are done partitioning I was asked if I wanted to create an EFI partition. I do have Windows 7 already installed in EFI mode apparently (that was a mess up on my part) ...
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1k views

No EFI boot possible with Clover EFI

So I have this Vaio Duo 11 sitting next to me, and it works very nice. But to have some sort of bootloader which also is compatible with Hackintosh, I wanted to install Clover. I used my MacBook Air ...