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

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Attempting to install Windows 8.1 as secondary OS, misdetects EFI partition

Currently I have Arch Linux installed as my primary OS, and wish to install Windows 8.1 as a secondary so I may utilize certain special hardware (a capture card which has no Linux drivers at the ...
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UEFI bootloader

Issue is that EFI systems only allow you to boot using FAT32. I have to deploy multiple images of Windows 8. My WIM image is larger than 4GB and unable to transfer to a FAT32 partition. I've been ...
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Unhide a EFI System partition

I don't know how I come to this but the partition I use to install Windows 7 64-bit is hidden. It is also a EFI System partition (I saw this using the Disk Management tool). Since the Windows ...
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Difference between UEFI and BIOS architecture

How does the UEFI offer an advantage over BIOS architecture? Why is it so difficult install Linux(read Ubuntu) as a dual boot option on a UEFI Windows 8/8.1 PC? I say it's difficult because of this ...
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How to boot from 3TB HDD?

I just bought a new HDD of 3TB (not yet shipped). I didn't know that size is normally not supported to use it to boot OS. I learned I need a computer that supports UEFI so that I can install windows ...
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Installed/Updated Windows 8 UEFI after Ubuntu - Restore GRUB

So, I had a laptop with Windows 8 OEM copy obviously installed in UEFI configuration with GPT partitioning. A little while ago I installed Ubuntu 13.xx(the latest one) alongside it and GRUB ...
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What is UEFI? How do I know if I have it? [duplicate]

Possible Duplicate: How to know if my BIOS supports UEFI? Just watched the Win8 keynote thing, and seemed like the fast boot times required something called UEFI(?). What is that? How do I ...
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461 views

what is the purpose of UEFI SecureBoot?

I heard that new computers will have a "secureboot" feature built in, and that it's supposed to keep "unsigned code" from booting. I haven't seen any issue with a possibility to boot the wrong OS,as ...
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Motherboard battery and clock

my girlfriend just built her new PC on her own. Everything is fine except that the motherboard (890GX Pro3) doesn't remember settings, boot preferences and datetime every time she turn the power ...
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What can an end user do with efi or uefi?

Other than greater support for hardware, what advantage or use could an end user (read: NOT an expert) do with an EFI shell or EFI BIOS? I've seen the shell once on my MacBook Pro, but it seemed ...
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How to change active boot partition of Windows 8.1 UEFI?

I've a 64 bit Windows 8.1 on GPT / UEFI and am trying to boot to another OS without a CD-ROM or external harddisk. I've created a fresh partition (Z:) and copied Puppy Linux.iso over to it. However, ...
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Fix Windows 8 bootloader after converting MBR disc to GPT

I bought a new MoBo, processor, and some 3TB HDDs last week and am currently setting up a clean installation of Windows 8 on the machine. The MoBo is an Asus RoG Maximus VII Ranger (What?! It was ...
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534 views

What configurations are different between BIOS and UEFI “AFTER” OS boot?

I tried installing Ubuntu in UEFI mode to VirtualBox. The installation was fine, but after rebooting, OS started correctly while the graphic environment didn't start. This problem itself was reported ...
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Will Windows 8 install on MBR?

So will Windows 8 install on a disk which is of partition scheme MBR? Also, can there be anything like MBR and UEFI? (Isn't it GPT + UEFI?) Do the First Generation of Intel Core (i3,i5,i7) support ...
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Gigabyte GA-Z77X-D3H MB problems

I installed a new system last week. I've some issues with it. The system consists of a: Gigabyte GA-Z77X-D3H with F9 BIOS (latest) Intel Core i5 3570K proccesor Sapphire Radeon HD7850 2x 8GB ...
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6k views

Boot non EFI MS-DOS Windows 7 partition with grub2-gpt

I have the following setup: UEFI Asus Motherboard GPT TABLE and Ubuntu on /dev/sdb MS-DOS TABLE, Windows 7 and Linux Mint on /dev/sda I try to boot the Windows 7 partitions with grub2 from Ubuntu ...
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323 views

Can Windows 8 and 7 be installed on the same UEFI computer?

My system has UEFI, and I want to install both Windows 7 and 8 on a large drive formatted for GPT (I want to also install a few other operating systems, and I need more than 7 partitions). After ...
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701 views

Boot Linux with extlinux from EFI & GPT

Last time that I tried to create Ubuntu/grub2 dual-boot on my new Asus computer, which came preinstalled with Windows 8, I almost stoned it. So, I'm thinking to use extlinux as my bootloader for my ...
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2k views

UEFI with MBR partition table?

i want to convert current GPT partition table to MBR. But my laptop has UEFI, so is it safe UEFI with MBR partition table? or maybe i am misunderstanding about UEFI/GPT things?
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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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2answers
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How to boot windows after uninstalling ubuntu?

I am using windows 8 system and I tried to install ubuntu by making a separate partion. But after deleting the partitions created for Ubuntu, it is still trying to load ubuntu and not windows. If I ...
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Windows boot manager and two hard disks

here's my situation: I had an HDD with Windows 8 installed (UEFI mode). I bought a SSD and wanted to do a clean install of Windows, so I thought that disabling the HDD and leaving the SSD as the only ...
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Just installed Fedora 18 and computer is not booting

After some initial trouble, I was able to install Fedora 18, but Had to Disable Secure Boot, disable Fast Boot, and Enable CSM. Side Note: I was reading that by Enableing CSM I was not going to be ...
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How to access the GUI of UEFI on ASUS Laptops?

My ASUS Laptop has UEFI and GPT Paritions running on Windows 7 x64. I've heard a lot about these GUIs. How do I access them? As using the F2 button simply brings up the plain old BIOS UI.
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Is there a way to know if the system you are on is BIOS or UEFI?

Is there a way to guess from the running system if you have BIOS or UEFI? If so, then how ? I am running Debian as my main OS. If not, if I go to BIOS or UEFI menu is there a way to check which way ...
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After installing August 2015 updates, Windows 10 endless loop - light blue BSOD “BAD_SYSTEM_CONFIG_INFO” - that cannot be repaired, reverted, or reset

I made a dumb decision and opted to accept Microsoft's offer to upgrade from Windows 8.1 Pro to Windows 10 "for free," which is only true if you don't consider your time or ability to start your PC ...
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Is there any advantage to a particular boot order when using UEFI?

Just built a system with motherboard that supports the UEFI. I didn't realise what it was at he time and was interested to know why it appears to be attached to a 1TB HDD. I have in my system room for ...
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How to delete OS from boot menu

After installing fedora and Centos and other OS now I have them all showing in my Boot menu [F2] on start up not the menu form the OS even after deleting them and reinstaling other OS - Ubuntu -so It ...
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2k views

Install Windows 7 after Ubuntu: Cannot install because of GPT partition

I'm trying to install Windows 7 on a NTFS partition after installing Ubuntu 14.04. But it says that I'm using a GPT partition. The solution I found was to erase everything, then install Windows 7 then ...
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Reinstalling Windows 8 on a tablet

I got my hands on a Samsung XE700T1A, one of the ones handed out at one of the early Windows 8 BUILD conferences. It's been upgraded from Windows 7 and recovered from an image at some point, so there ...
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creating UEFI USB Boot stick using rufus option gives errors

I am trying to install windows 7 from a USB UEFI stick that I tried to create in vain. I read other posts on creating UEFI USB Boot sticks and found Rufus the most convenient option . However , Rufus ...
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Fedora 19-1, Aptio UEFI and non-CSM Boot

I'm trying to install Fedora 19 on a UEFI computer. The laptop is an ASUS Q500A with Aptio UEFI (firmware or BIOS) version 208, GOP 3.0.14.1015 (Aptio is American Megatrends). I downloaded the latest ...
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How many EFI System Partitions (ESP) can a computer have?

I'm trying to set up dual/multiboot on an UEFI laptop that came with Windows 8 installed. I'd like to operate with Secure Boot enabled. I can install/configure OS'es with SecureBoot disabled (but I ...
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Install Windows 7 on second hard drive after Ubuntu 12.04… with UEFI

What I would like is to have Ubuntu installed on my 60GB SSD and Windows 7 installed on my 1TB HDD in a 100GB partition, leaving the remaining 900GB as a NTFS data partition that I could access from ...
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1answer
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How to identify UEFI-capable laptops?

I'm on the market for a UEFI-capable laptop for development purposes - looking to play around with UEFI boot and the UEFI shell in general. I'm having a hard time being able to identify machines with ...
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How to distinguish a legacy BIOS from a UEFI/EFI BIOS? [duplicate]

Is there any test that I can run to figure out if my BIOS is a legacy one or a UEFI/EFI BIOS? It looks like it's a legacy one: there's no fancy window but only ugly white words on blue background, ...
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How do I make a UFD that will boot on UEFI?

I have been trying for more hours than I'd care to admit to get a bootable UFD (USB Flash Drive) with Windows PE on it. There are loads of tutorials, all of which I've been trying in succession, but ...
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UEFI strange behavior - works once but deletes MBR

I have a Toshiba Satellite L50-A1-D6 with the latest (14 November 2014) BIOS update. I have removed Windows 8, completely formatted the HDD (in GPT), and installed Linux (Ubuntu, but this is not ...
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Normal ISO to UEFI bootable ISO converter?

It's easy to Google Windows 8 password recovery tools. However, the PC I'm working on right now doesn't support legacy boot and can only boot from GPT partitioned USB sticks. I'm using Rufus for ...
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1answer
43k views

How to fix Boot Configuration Data (BCD) for Windows 8 EFI system

I have Lenovo H530 Desktop which comes with Windows 8. I tried to install Ubuntu on the system and ended up messing something on my way. Current status is my system won't boot into either one of them ...
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Partition Issue with Windows 8.1 Installation

I bought a brand new machine and I wanted to install Windows 8.1 on a single 4TB HDD. I want to partition the drive using the following layout: Drive 0 Partition 1: System Reserved - whatever the ...
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3answers
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How to reinstall Windows Boot Manager on EFI partition

So I've been trying to install Ubuntu on a second HDD on my desktop, which has W8 installed on a SSD (UEFI-only boot). Thing is, during Ubuntu installation I made the mistake of choosing to install ...
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2answers
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Can UEFI settings brick new laptops?

See closed question - this is a less localised version of the same question. Summary: changing CMS support in BIOS after attempting dual boot Windows 8 and Ubuntu 12.10 bricked my laptop. While ...
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Windows 8 changes boot order

I installed Windows 8 and Ubuntu 12.10 on a 3TB GPT disk in UEFI mode. Both can boot up OK. Both operating systems created their ntries in the UEFI boot menu, there's an "ubuntu" and a "Windows 8" ...
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Computer won't boot, UEFI beeps

It has been a couple days by now and I am still trying to find out what the problem of my PC is. I have made a short video of what is happening when I run my PC on and in this video you might notice I ...
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I get a red bar when trying to install windows 7 DVD, and it freezes

I get a red bar when trying to install windows 7 DVD, and it freezes. I read here ...
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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 ...
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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 ...
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141 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 ...
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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 ...