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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Access UEFI BIOS settings

I have a NEC ultrabook with windows 8 installed, and with UEFI bios. I was told that in order to access the BIOS settings I have to press the F2 key as soon as i power it on, however it doesn't ...
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27 views

Why can't I install Windows 8 on an UEFI machine from an MBR based USB disk?

Just tried to install Windows 8.1 on an UEFI machine/GPT disk. I used a 2 TB MBR-based USB drive to contain the installer (FAT32 partition with Windows 8.1 install files). I got as far as selecting a ...
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26 views

AMD Radeon video card/display only works with UEFI Fedora

When I was using my onboard graphics, Intel HD4600, I was able to set up a dual boot on my SSD with a legacy BIOS Windows 8.1 64-bit installation and legacy BIOS Fedora 20 64-bit installation. I put ...
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16 views

How can I tell if a Windows 8.1 machine has 'full' UEFI?

I've seen a Windows 8.1 machine that has a MBR format drive and a 'Legacy' BIOS, and it has fancy graphics that look like UEFI. If I have a GPT format drive is it still possible to have the old style ...
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25 views

How to recover Windows Boot Manager after a Mint installation gone wrong

Yesterday, my cousin wanted me to install Linux Mint onto his Windows 8 Lenovo laptop so he could dual-boot Linux Mint and Windows 8 so he could get some hands-on experience with Windows 8. I've ...
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26 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 ...
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29 views

Installing Windows 8 on SSHD. Drive not recognized?

I've been trying to install Windows 8 on a new Seagate 1TB SSHD that I got. I managed to make a UEFI bootable USB drive, and installing Windows 8 went fine. But then after the installation it tried to ...
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12 views

In Windows 8.1 what are the differences between UEFI, and the UEFI style Legacy BIOS?

When using Legacy BIOS (and MBR format disc) the BIOS still looks like UEFI, has a mouse pointer, and appears to function in a similar way. I believe that you can only use Secure Boot with UEFI on a ...
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63 views

Is UEFI more or less vulnerable than Legacy BIOS?

Is UEFI more secure than BIOS on a Windows 8.1 machine? Is UEFI vulnerable to malware in ways that Legacy BIOS is not? Is it correct that UEFI can connect to the internet before the OS (or ...
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49 views

Is a hybrid Linux USB-Stick for UEFI & legacy BIOS possible?

my idea is to create an USB-Boot-Stick with Lubuntu that is able to boot on an older BIOS Laptop and an newer UEFI Systems. This would be quite easy, when the Stick would be setup as a legacy boot ...
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15 views

Third monitor Windows 8.1

My current setup has two monitors running off of crossfired AMD Radeon 7870's, I am looking to add a third monitor for non-intensive usage. I've been led to believe this is possible by changing a ...
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24 views

How to change from UEFI to legacy without reinstalling Windows?

The machine has UEFI enabled. I can't boot anything except Windows; No bootable USBs. I have to change it to legacy mode, but Windows 8 won't boot in legacy mode. So the only solution I can think of ...
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1answer
23 views

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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30 views

Chainload a partition using GRUB2 on a UEFI system

I am trying to install Windows 7 on my laptop which came with Windows 8, but it doesn't have a disk reader and I don't have a USB drive big enough for me to write the Windows 7 ISO to. I wrote the ...
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2answers
55 views

How to partition hard drive from MBR to GPT for Windows 8.1 UEFI install

I just bought a new HP notebook (ProBook 450 G0) and it came preinstalled with Suse 11 Enterprise. Now this is the first time I've owned a system with an (U)EFI and I don't know how things work on ...
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2answers
71 views

How to partition hard drive from MBR to GPT for Windows 8.1 UEFI install

I just bought a new HP notebook (ProBook 450 G0) and it came preinstalled with Suse 11 Enterprise. Now this is the first time I've owned a system with an (U)EFI and I don't know how things work on ...
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2answers
108 views

How to configure dual boot NixOS with Mac OS X on an (U)EFI MacBook?

I could not find any description of configuring dual boot of NixOS and Mac OS X on an (U)EFI MacBook. I am willing to experiment, but i would like to know at least that what i will try is supposed to ...
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82 views

New Mainboard Z97-K and OS is only bootable with the usage a LiveCD

I have a new Mainboard, CPU, Ram for his PC - a Asus Z97-K other components like PSU, SSD, HDD are taken from the old Bios based Core2Duo PC The OS is Linux Mint 16 and the LiveCD also - there is no ...
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14 views

Ubuntu 10.04 Installation Replacing Windows 8 2TB Hard Drive

As a point of reference and documenting for the Greater Good, I thought I'd post something I've discovered. After searching forums for days, I haven't come across this specific tip that might be of ...
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1answer
82 views

Want to buy Asus H81M-PLUS motherboard and i3-4150 CPU; how to make sure it'll work?

I want to buy an ASUS H81M-PLUS mainboard and an Intel i3-4150. The CPU is an Haswell Refresh CPU, but the mainboard needs a newer BIOS version to support the CPU. I expect it won't be shipped with ...
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No booting option in UEFI

I recently tried to install Mac OSx into a laptop computer (Asus X550v) but the UEFI lost all the boot options, so the computer only start into the UEFI mode. Any idea how to fix/add booting options? ...
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1answer
71 views

Monitor only works if Legacy BIOS (CSM) disabled?

I have an Asus Q550-LF computer running Windows 8.1 Enterprise. It has a MiniDisplayPort output which is connected to a MiniDP to DVI adapter. I discovered that my monitor was not working the same day ...
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102 views

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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41 views

hp probook white screen with error cancel image and boot to next boot order

I bought HP Probook 440 G1 with windows 8 Pro. I am a ubuntu user so I wanted to install ubuntu with Windows side by side. I tried to boot it from USB or DVD ROM but was unable to do so. Then from ...
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How do I get my system to find a “buried” MBR?

Following a botched Linux install, my Windows 7 install can't find my MBR normally. It's in there -- somewhere -- and I CAN access it if I use F12 during boot to access the mobo boot options: Note ...
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24 views

Installing Ubuntu 12.04 x64 in MBR

I wanted to install Ubuntu 12.04 side by side with Windows 8.1 in my SSD. Windows is already installed in MBR, even though I have a UEFI machine. And so I used the legacy Bios. I have confirmed that ...
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1answer
78 views

Adding X.509 certificate to UEFI secure boot database?

I have recently installed Fedora 20 on a custom desktop PC with a ASUS Z87-K motherboard. Given some commonly known bugs, I have installed the NVIDIA proprietary driver for my GeForce 630, and ...
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1answer
54 views

Restore boot without formatting (UEFI)

I have a problem and I would not format more my poor HDDs. Hardware situation: Motherboard Asrock 970 Extreme4 (UEFI) HDD1 (/dev/sda) -> Recovery | EFI Partition | Windows 8.1 HDD2 (/dev/sdb) -> ...
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54 views

Beep-Codes definition for ASUS motherboard

I'm having a hardware failure when booting then I need to know the exact beep-code definitions for this model: Asus M5A97 LE R2.0 Someone could provide me the beep-codes of that motherboard?, I ...
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101 views

Restoring Windows 8.1 is blocked by UEFI

I accidentally wiped my Windows partitions while installing Ubuntu, but fortunately, I did a complete backup before trying to install it. The laptop is a Yoga 2 Pro, if that helps at all. The ...
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147 views

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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219 views

Error 0xc000007b when trying to start \EFI\ubuntu\shimx64.efi (Ubuntu) through Windows 8.1 Bootmanager on an UEFI System

Error 0xc000007b when trying to start \EFI\ubuntu\shimx64.efi (Ubuntu) through Windows 8.1 Bootmanager on an UEFI System EFI Entries During Ubuntu Setup, Ubuntu automatically created an EFI start ...
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1answer
154 views

Installing linux on a macbook pro - boot broken

So I tried to install ubuntu 14.04 on my macbook pro (completely replacing OSX). I had refit installed, but not it seems gone. And every time I boot, the PC can't find any OS. I tried using ...
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239 views

Ubuntu 14.04 installation on Asrock H77M UEFI, dual boot with windows 8.1 already installed

As the title says, I need to install ubuntu in dual boot with windows 8.1 on my home PC. I knew that with UEFI partition table was written in GPT, but I found that the partition table on my hard ...
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140 views

Shortcut to UEFI firmware settings on Windows 8

I often switch out of Windows 8 to Linux on another partition, but it's awkward : Windows + I Shift + click restart click Troubleshoot click Advanced options click UEFI firmware settings and only ...
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2answers
254 views

Cannot boot Windows 8 into UEFI mode (CSM only)

I have a laptop (pre-installed Win8) that has been through numerous dual-boot configurations. At one point, I had removed everything and ran Linux Mint as the only OS. Eventually, I decided to remove ...
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3answers
102 views

Two Windows 8 installations on separate hard drives - failure to boot

My motherboard supports UEFI and I have 2 disks on it. I did the following steps: a) Installed Windows 8 via USB on hdd1 (Let 's call this WinA). Worked fine, booted fine multiple times. b) ...
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152 views

This should be simple: “winload.efi missing or corrupt” yet neither. Win8.1 not booting

I have a desktop PC that was running Windows 8.0 from a slow HDD. I unplugged the old drive and installed a new SSD and Windows 8.1. Once I got it running, I unplugged the SSD and plugged the HDD ...
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133 views

'UEFI boot source (windows 8)' and 'Legacy source (RHEL 6)', dual boot issue, after installation

On new system where windows 8.1 installed already, I have shrieked the partition and tried to install RHEL 6. But the DVD is not detectable (may be because it is not supporting UEFI boot source). ...
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107 views

Unable to access UEFI settings on Lenovo

I have a Lenovo G580 on which I installed Windows 8 and several Linux distros which have messed with my booting. The last I used was boot-repair tool. I have an EFI partition on sda2. The Grub load ...
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43 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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2answers
1k views

UEFI Legacy boot hidden - tricks to unlock it?

I bought an Acer Aspire E1-510P-4459 with Windows 8.1... And I am considering installing Linux on it; maybe Win7, but I'd need to get a USB CD for that. So I downloaded a live image of my favourite ...
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81 views

Encrypting GPT Windows 8.1 on a multi boot system?

I have setup LVM on LUKS for my Linux partitons which I am very happy with but I would also like to encrypt Windows 8.1. I had planned to use TrueCrypt until I learned it does not support GPT. I would ...
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1answer
53 views

Computer does not boot properly after UEFI issue

I tried to have win8.1 and ubuntu installed at the same time, anyway, I failed. My problem at the moment is that after that I had just Win8.1 or just Linux installed and my Laptop does not boot ...
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157 views

Toshiba Satellite C850 boot loop

I've got a Toshiba laptop acting strange on me. Any thoughts appreciated. C850-11C PSCC2E AMD E1-1200 APU Windows 8 UEFI Problem: Laptop cant restart. If i shut down the OS or restart, or it ...
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2answers
522 views

0xc0000225 Error on Windows Installation to GPT (UEFI)

I am attempting to install Arch linux and dual boot it with windows. As I am running a modern UEFI system, I have put my SSD (see Specs below) in GPT format (losing my original windows installation in ...
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221 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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62 views

Booting a GPT USB key on older BIOS laptop

I have an old HP EliteBook 8530p, which does not support booting from GPT USB (GPT HDDs are fine though). Lately I had the wish to have a fast-to-start OS for browsing, smaller web tasks, etc., so I ...
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329 views

How can I dual boot a UEFI OS and a legacy boot OS, or convert stock Windows 8 to BIOS?

I have a computer (HP Pavilion g6-2342dx) which came with Windows 8, and thus the new UEFI boot system. I would like to install a few OS's which are not EFI compatible, and Arch GNU/Linux with BIOS ...
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143 views

Can drivers installed on a OS be used by UEFI?

I'm a little perplexed what happened here. I just finished building a PC. Powered it up and went into the UEFI options. During this time the resolution was set for 800x600, and I was getting small ...