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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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
390 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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586 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
1k 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
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 ...
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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 ...
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2answers
706 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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703 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
902 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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280 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
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 ...
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1answer
246 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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1k 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
624 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 ...
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452 views

Chainload EFI Bootloader from grub2 installed on MBR

When trying to chainload a EFI-bootloader from my grub2 I always get an Invalid signature error. According to this question, it happens because my grub2 is installed on an MBR-harddrive. The author of ...
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2k views

Boot ISO image from GRUB4DOS on EFI machines

I failed with loading ISO image (non-distro) from GRUB2 from USB stick, but found the way how I can boot the GRUB4DOS and then load the image from there. However, it doesn't work all the time and the ...
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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 ...
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1answer
383 views

grml liveUSB does not appear as UEFI

I'm trying to repair my broken linux install with grml, since I hear it has EFI support, which I need for what I'm trying to do. Specifically, I need to see a 'UEFI:' prefix before my liveUSB drive ...
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435 views

Is it safe to remove EFI System Partition?

From this answer , I know how to remove a EFI System Partition . But is it safe to remove it ? The EFI partition appears in an empty disk . I have already removed all other partitions. I used to ...
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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 ...
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1answer
1k views

Repairing Boot Camp on a secondary hard drive

I managed to install Windows on a partition of a secondary hard drive with Winclone, but I am unable to boot on it. Now when i choose windows as startup device i get the "No bootable device --- insert ...
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1answer
4k views

What is the EFI shell?

My BIOS offers me the option to launch an EFI shell, but I have no idea what that is. Does it allow me to turn on CPU flags like VT-x or something similar? Why would I want to use it?
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108 views

Which bootloader to use when dual booting a Mac without OSX (Win/Ubuntu)

A while back I used Bootcamp to install Windows 8 on my 2011 27' iMac. Accidentally using the Windows installer I overwrote Windows onto my OSX partition. Now I would like to install Ubuntu on to my ...
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1k views

Windows 7 boot fails with EFI/Grub/Ubuntu

My windows doesn't boot. Here is a screencast. https://plus.google.com/104553781986069868504/posts/ddRjsxuvtUi Initial situation For some special cause, I had two concurrent windows 7 installations ...
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564 views

Is the Windows 7 file recover/image backup broken on Windows 8?

I find the following in the backup log after it runs for an hour or more. Windows Backup failed to get an exclusive lock on EFI system partition (ESP). Isn't the EFI only used for booting the ...
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1answer
2k views

Mint Uefi installation

I got few small issues with a Mint installation. I've bought a new laptop (Asus n56vj) with a preinstalled Windows 8 system. And there is the first problem, laptop has uefi mode on. So when I try to ...
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2answers
13k 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 ...
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212 views

EFI Dual-boot issue with Windows 7 and xubuntu 12.10

Thank you so much for reading. I'm pretty desperate for an answer at this moment. So anyways, I recently solved this issue allowing me to install xubuntu 12.10 correctly. This was a problem with the ...
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1answer
833 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: ...
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1answer
449 views

Can't access UEFI after switching from BIOS on Windows 8

I'm currently using an unmodified ASUS K52J laptop running Windows 8 and trying to develop for Windows Phone 8. In order to meet the specifications necessary to successfully run the phone emulator ...
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583 views

Does the 'mount' command rely on MBR to detect partitions, or can it use the GPT partition table?

TL:DR I have Mac, which means I have EFI and a GPT formatted disk with a hybrid MBR. I am considering adding a fifth partition; to do this, I will mask my first three GPT partitions with one ...
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Windows 8 bootloader fails to start after installing Fedora 17

I installed Windows 8 (which was pre-installed) on my machine. Later, I installed Fedora 17, but the Windows loader must have been damaged. Then, I cannot see the Windows boot, I can only see GRUB. I ...
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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 ...
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2answers
3k views

Using VirtualBox with a local Windows 7 installed on the hard drive

I just discovered today that one can create VirtualBox VMDK files that simply reference real partitions on local disks and, needless to say, got pretty excited. "This means I can boot my Windows 7 ...
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1answer
979 views

secondary SATA drive in SATA1 vs SATA3 - EFI booting and BIOS problems

I just got a new PC (HP P7-1380T) with Windows 7 preinstalled. The machine is set up for EFI booting without 'secure boot'. I had planned to install my old SATA drive (dual-boot XP and Linux with ...
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3answers
925 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 ...
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1answer
938 views

How to install debian wheezy on a i386 computer with efi bios

Is there a way to install debian wheezy on a i386 computer with efi bios using an USB pendrive and the debian iso? What steps should I follow? I searched the internet and have not found any clear ...
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1answer
2k views

Linux EFI Live CD/USB

I was trying to boot from CD on a new HP Pavilion dv6 a few days ago with much frustration due to the Linux distributions I tried not working with EFI. Additionally, the EFI Bios is Insyde H20, which ...
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1answer
623 views

EFI System Partition and unallocated space?

I just got a 3 TB external hard drive (I didn't look closely enough and ended up buying one for Mac but I run Windows 7) and it came with a bunch of software I don't particularly want. I want to ...
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1answer
618 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). ...
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2answers
9k views

Do I need to re-install windows 8 to enable UEFI?

I know that UEFI provides for much faster boot up speeds, but as of right now it is disabled in my BIOS. Should I enable it and it'll switch over auto-magically?
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1answer
9k views

How to disable efi on ASUS zenbook

I have just purchased an ASUS UX31A-DH51 Zenbook with Windows 8 preinstalled and I want to remove it and install Windows 7. However I can't load Windows 7, it hangs at the beginning of the install ...
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0answers
863 views

Why does Windows 8 takes longer to boot on EFI enabled system when EFI is not used?

I have a MacBook Pro and I installed Windows 8 on it. Windows 8 took ages to boot up (15 minutes atleast). Because the MacBook Pro is fast, I thought it must be a hardware problem and tried installing ...
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1answer
4k views

Windows 8 EFI issue

I am trying to install windows 8 on laptop with Raid 0 (stripe) as second system and have following error: Windows can't be installed on drive 0 partition 6 (show details) Details says: Windows ...
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2answers
2k views

Lost Windows 7 boot after EasyBCD with EFI

I've got a Lenovo Y580 with a 64GB SSD and a 1TB HDD setup using GPT and setup to boot from (U?)EFI. I was trying to get my Linux Mint installation on the Windows boot manager using EasyBCD (I ...
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1answer
8k views

How to install Windows with no CD drive boot option in BIOS?

I have a new computer which I built from scratch and I am trying to install a copy of Windows Vista on it. I am able to get to the BIOS and change the boot options which are as follows.. -Built-in ...
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164 views

elilo commandline boot config that includes spaces

I've got an elilo (EFI LILO) config file that includes spaces in the label - like that: image=/EFI/gentoo/boot/kernel-genkernel-ia64-3.1.6-gentoo label="Gentoo IA64 3.1.6" ...
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1answer
1k views

Resize EFI system partition

I have a Windows 8 installation on a 500gb hd with the following partitions; Recovery 300mb EFI System Partition (ESP) 100mb Reserved 128mb Primary 145gb Leaving me with free space of 319gb I'm ...
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3answers
4k views

How to boot Windows DVD without UEFI

I searched the web, but didn't find anything. I formated my single partition (300GB) to mbr partition table (it used gpt before). Now I want to install windows 7 but I can't because: Windows cannot ...