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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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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22 views

Benefits of UEFI or GPT for dual booting

What can be the possible benefits of UEFI or GPT for multi booting? Does using these new technologies remove the problem of fixing GRUB when installing Linux(Ubuntu) and then Windows? I am ...
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104 views

windows 7 hanging at “starting windows” screen after installing on preinstalled windows 8

i got this HP laptop and windows 8 was preinstalled but i wanted to have windows 7 and ubuntu only (don't ask why). so being unaware of the whole GPT - MBR thing i went ahead and deleted all the ...
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20 views

Why BIOS(UEFI) doesn't find GPU sometimes?

i have bought new pc and got some troubles with it. Sometimes when i power on it, bios says (beeps) that GPU is not found, and sometimes after sleep mod GPU doesn't starts, and screen are black with - ...
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36 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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30 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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1answer
70 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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1answer
75 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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1answer
96 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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77 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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2answers
100 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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2answers
66 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
94 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
65 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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77 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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70 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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75 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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30 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
324 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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1answer
59 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
36 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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1answer
80 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
247 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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118 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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47 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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2answers
166 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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3answers
135 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 ...
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1answer
503 views

Windows 8.1 installation from USB after deleting Windows Boot Manager in BIOS/UEFI

I removed Windows Boot Manager option from BIOS (UEFI) with EasyUEFI, after reboot I got an error message about broken BCD, need to be recovered, I tried to reinstall Windows 8.1.1 Pro X64 from USB ...
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81 views

Restoring Windows 8.1's UEFI files

During a failed attempt to install Arch Linux, I accidentally wiped my UEFI partition clean. Now I cannot boot into my Windows 8.1 installation. (I'm pretty sure its partition is intact). I've ...
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3answers
544 views

SATA Devices not showing up when in UEFI mode

I'm trying to install Windows and the bios should be set to UEFI mode. The problem is that all SATA devices aren't showing up (shows as if there aren't any) so I can't boot from the installation CD ...
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96 views

How to change 'timeout' of the UEFI boot manager from Windows 8?

How can I change the 'timeout' setting of the EFI boot manager from within Windows 8? I am trying to dual-boot Windows 8 and Ubuntu and I would like to be able to choose one or the other OS at boot ...
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60 views

Trying windows 7 dual boot on a windows 8 machine

I have a ThinkPad (T530) with Windows 8.1 with one HDD and this is what I have done to achieve dual boot with Windows 7 on this machine - On my main and only hard disk I created a new volume ...
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144 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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2k 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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29 views

Boot Linux with ELILO 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 ELILO as my bootloader for my new ...
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117 views

Recover windows 8 UEFI Boot

I have a Asus x202e notebook and I accidentally deleted the whole partition table while trying to install Ubuntu. I have recovered the partition table using testdisk tool. Now I see OS, Data, Restore ...
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1answer
93 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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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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2answers
1k views

Windows 8.1 can't detect DirectX 9?

i have really weird problem, just installed for couple times the Direct X 9.0c on my Windows 8.1 Update 1 64bit recently - but the system seems like doesn't assume if DX9 has installed, tried playing ...
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2answers
46 views

Enable external boot devices in UEFI

I own an HP Pavilion 5 Notebook which came pre installed with Windows 8. I'm trying to install Ubuntu on my system via a LIVEUSB. But my system doesn't detect the LiveUSB during boot. My boot order ...
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2answers
100 views

Why must I install Ubuntu in EFI mode if my other OS is installed in EFI mode?

I'm trying to create a dual-boot system on my new Asus computer, which came preinstalled with Windows 8. I want to install Ubuntu. The documentation says that if my Windows installation is in EFI ...
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0answers
90 views

Restore automatic bootup of Windows 8 in UEFI

My Acer AMD laptop came bundled with Windows 8.0 in UEFI. The state it's in now is that every boot stops at a prompt, and I have to hit ENTER at this screen to continue: How can I make this ...
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1answer
619 views

Grub menu not showing for Ubuntu 12.04

This is the first time I installed Ubuntu(v12.04). I have a HP laptop pre installed with Windows 8. I installed it alongside Windows and the installation was successful. But after the customary ...
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1answer
63 views

Ubuntu LiveUSB not booting in HP laptop

I am using a HP Pavilion laptop pre installed with Windows 8. I am trying to install Ubuntu 13.04 on my laptop using a LiveUSB, which I created in the conventional way given on the Ubuntu official ...
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1answer
412 views

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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120 views

Extract Samsung OEM recovery from laptop HDD

I have a Samsung NP540U3C with Windows 8. I recovered it to factory condition, booted and it was fine. There were 107 Windows updates so I downloaded and installed them, rebooted and then I was ...
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1answer
172 views

LMDE, Windows 7 Dualboot ond UEFI Laptop

I've bought an Asus laptop where was Windows 8 preinstalled. Then, I've dropped Windows 8 and installed Windows 7 on the whole HD instead. This drive has a 100 MB system-reserved boot partition. ...
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1answer
92 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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2answers
128 views

How can I get my Thinkpad T420 to boot directly to GRUB, skipping the boot menu?

I installed ArchLinux 2014.03 on my Thinkpad T420 (no dual boot), and when I turn on the computer it takes me to a boot menu with only one option: arch_grub. To continue I have to press enter, which ...
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1answer
38 views

Chainload none-EFI Linux from EFI Linux

I read somewhere that it might be possible to boot none-EFI Linux from EFI Linux. If so, If my EFI Linux is booted by grub-efi, and my none-EFI Linux is booted by extlinux. How to chainload from ...