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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Ubuntu Linux won't start alongside Windows 10

Windows 10 pro is upgraded from windows 8.1 pro. I just followed this(https://www.youtube.com/watch?v=fE8XvuhyaaA) tutorial to Install Ubuntu. After successful install I unable boot into linux. I ...
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99 views

Cant Choose USB Boot From BIOS/UEFI

I have Philips 32 GB flashdisc. (FM32FD75B/97) When i enter boot options, i cannot see my device. I tried it with 1 desktop and 2 laptops and result is same. I also used Rufus/Unetbootin and Ubuntu ...
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How much room do windows 7-10 occupy on the UEFI System Partition­?

How much space do Windows 7-10 actually occupy on the UEFI System Partition (ESP)? my reasons: I'm installing Linux on a new computer with a blank hard drive. I would like the option of installing ...
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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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68 views

How to enter bios after unsuccessful windows 7 installation attempt?

I had Windows 10 on my computer and it was corrupted (couldn't connect to the internet). I decided to install Windows 7. Everything was fine up until it had to reboot mid installation. Then it asked ...
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86 views

Can't install Win 8 Pro on laptop due to BIOS keys

I have a Dell laptop installed with Win 8 (home) edition. A while ago I bought a copy of Win 8 Pro to install on the same laptop. Yesterday I attempted to install the Pro edition, but it didn't ask ...
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3answers
709 views

How to fix EFI-boot on my Macbook Pro after Linux install crashed?

After trying to install Linux (CentOs) and it crashed I can no longer boot W10. I can only choose OS X and its recovery after the alt option key.... The EFI partition is renamed to blank / NO NAME, ...
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35 views

Shuttle SZ87R6 with 3x SSHD 2TB hard drives doesn't boot

Hardware: 1x Shuttle SZ87R6 with 500W power supply 1x Intel i7-4790 4x G.Skill 8GB, DDR3-1600, CL10-10-10-30 (F3-12800CL10S-8GBXL) 1x Samsung SSD 850 Evo 250 GB (With linux openSuSE 13.2) 3x Seagate ...
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1answer
70 views

BSOD on Win 7 Downgrade ASUS F551C Laptop

I have an Asus F551C laptop that came with Windows 8.1. I used GPARTED to remove the GPT partitions and then created an NTFS partition and installed Win7 with no problems. I then ran updates and ...
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51 views

i have changed some settings in BIOS,like i disabled boot options,now my system is turning off immediatly

i have changed BIOS settings,like disabled boot options,disabled,i have disabled boot settings,now my system turning off immediately without showing anything on the screen,,how should i enter into ...
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2answers
656 views

How to repair a Windows Boot loader damaged by GParted?

My notebook has two disks (there is a third disk -/dev/sdb - that is cache for the second disk). Windows 10 is on the second disk (/dev/sdc) (SATA ODD) and was working very well until today. Ubuntu ...
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1answer
55 views

Boot problems (UEFI)

I have two drives, one is a HDD, it has windows 7 and an EFI partition the second is an SSD it has some EFI files and the BCD. Whenever I plug the SSD in, the PC always boots from the SSD, in which ...
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36 views

Trying to install Windows 7 onto a wiped Windows 8 laptop running Ubuntu 14.04 then coming up with missing winload.efi error

I'm on an ASUS V550C, which was previously running Windows 8 however I wiped this in favour of Ubuntu 12.04 (now 14.04), which I installed without needing to mess around with the UEFI too much (it's ...
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1answer
170 views

UEFI CSM / legacy performance

Are there any known performance problems of "legacy" Operating Systems (Windows 7, for example) running on UEFI with CSM? Lately, I've seen quite a few brand-new computers by different OEMs that have ...
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47 views

Move bootmgr from one drive to another (EFI)

My computer currently boots from my HDD, then loads the system located on my SSD. In the following picture, disk 0 is my HDD that contains the boot manager, and disk 1 is the SSD I want to boot from. ...
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2answers
1k views

Boot from live Tails SD card on Mac OSX El Capitan

Goal: Boot into Tails from an SD card on a Macbook Air running El Capitan. Specs: Macbook Air, 8Gb RAM, i5, Running OSX 10.11 "El Capitan". Solutions tried and problems with each: Follow Tails ...
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Query about Graphics card and UEFI Support

I am trying to better understand graphics cards and UEFI support. Some related post seems to be here on this forum as well. It seems there are graphics cards that have UEFI Support. My understanding ...
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2answers
394 views

Tried triple boot on MBP, broke Windows

I have a MBP with OS X 10.11 (El Capitan) and Windows 8.1 (via Bootcamp). I now wanted to add Ubuntu to the pack and therefore created a new partition using Disk Utility in OS X. From that moment on, ...
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222 views

When is WinRE Partition created on Windows 10 upgrade?

When we upgrade Windows 8.1 systems (UEFI) to Windows 10, we see a 450 MB Recovery Partition is created from the OS partition. On searching further, we figured this is the new WinRE partition created ...
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1k views

ASUS T100TA - How I can install Windows 7

I need to install Windows 7 on my ASUS T100TA, Windows 8.1 very lagging, so why don't try install Windows 7? First, I prepared 32-bit Windows 7 install USB, entered into BIOS, disabled Secure Boot, ...
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400 views

Converting BIOS mode Arch Linux to UEFI

I have an arch install on my PC, But dual booting windows 10 needs UEFI. How would I convert BIOS into UEFI ? Without losing data.
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65 views

Blue screen during Windows 10 installation (Asus N76VB)

I'm trying to install Windows 10 on my ASUS N76VB notebook. I'm getting very weird and unstable results starting from file copy/read erros ending with random blue screens of death. I'm installing it ...
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1answer
144 views

How do I disable boot from usb on my laptop?

I have a HP Notebook PC 15-ac020nk, dual boot (Windows and Linux). I would disable boot from USB, but this option is not found in the BIOS. Do you have ideas to disable the boot from usb? I tried to ...
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279 views

UEFI-Implementation-Issue (can lead to a hard-brick) - ASUS Zenbook UX303LA-R4342H

Question-State: solved (not really but it basically works) Edit (Current-Progress): ASUS released a new "BIOS-Update" (BIOS 210; Update FW) which fixes the "BIOS-Settings" issues, but I'm not sure if ...
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1answer
968 views

Working with Debian 8 and Windows 10 and the EFI partition

I'm trying to install Windows 10 and Debian 8 dual boot. Single SATA disk System is UEFI so will be GPT Using DVD installers for both OS Am installing Windows first There's no final setup so I can ...
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2answers
412 views

Windows 10 UEFI Installation

I am trying to do a clean install of Windows 10 on ASUS N550JX. I have a Samsung 850 Evo SSD. I have deleted all my partitions using GPARTED. The problem is whenever I boot up my USB containing ...
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1answer
407 views

Reset supervisor password on Toshiba Portégé [duplicate]

I want some thing "software" that can help me to remove bios password on my **Toshiba Portégé Z30-A-12T. I still remember the user password for bios but i can't remove it. I hope to find a software ...
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2answers
97 views

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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2answers
509 views

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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28 views

Cannot boot Windows 8.1 after hard drive crash

I have a pc laptop that was dropped. HP 15-r132wm. The screen was broken and the hard drive was as well. How do I reinstall Windows 8 or Linux on this pc as it boots up to: Boot Disk not Found. After ...
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1k views

Acer E1-510 doesn't recognize thumbdrives or hard drives

I had a hard drive failure in this laptop, and both hard drives I've put in it show up in BIOS, but do not show up in the boot menu. The thumb drives don't show up in either BIOS or the boot menu. ...
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1answer
231 views

Boot from USB/DVD in EFI Mode

I would like to perform a clean UEFI installation of Windows from a USB/DVD. That involves reformatting the disk to GPT and re-creating the EFI sector. My question is: how to boot from a peripheral ...
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146 views

Unable to enter EFI firmware

I have Lenovo (G580 Model 20157) laptop. It had Windows 8.1. I dual booted it with Ubuntu 15.04. I am unable to go into EFI setup since then. I tried that by: Pressing F1, F2, F3, F4, F5, F6, F7, ...
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3k views

How do I repair Windows 10 UEFI/GPT disk which is left unbootable after deleting partitions?

I recently upgraded from Win8 to Win10. The Win8 machine was in a dual boot with Ubuntu on an 80GB SSD. After the update and a few other issues I created while messing around with GRUB, I'm now left ...
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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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1answer
392 views

stuck after first reboot with UEFI clean install of Windows 10

Install with media from MS MCT Win10pro x64 from a SD-Card slot. Did a fresh GPT partitioning of 128 GB SSD as from Win10´s choice. after the first reboot it stucks at the blue windows logo, but ...
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512 views

UEFI & legacy PXE chain to WDS

I'm making a PXE server (CentOS 7) that will be able to boot legacy and UEFI clients, so far this works fine, but i also want to be able to boot into WDS via the linux PXE, I was somehow able to make ...
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2answers
130 views

Boot Windows directly through Grub2

I have an UEFI multi-boot system with Windows 7, Windows 10 and OpenSUSE. Currently when I want to boot Windows, I first need to select Windows Boot Manager in Grub2, it then chainloads the Windows ...
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1answer
702 views

Change the keyboard layout of GRUB in stage 1

I installed grub on a EFI based system. So I have the EFI partition on /dev/sdc2 and my LUKS container in /dev/sdc5. I have only one linux partition in the LUKS container. So even /boot with the stage ...
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1answer
908 views

Dual booting Ubuntu with Windows 10 - UEFI USB not booting

I have never had issues dual booting my Windows machines with Ubuntu (pre Windows 10). I made my bootable USB, started working through the Ubuntu live installer but when it came time to allocate ...
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1answer
32 views

UEFI but not booting directly

I was playing around with my partitions finally now it doesn't boot directly. For it to boot I need to go to HP boot menu and then choose EFI file to boot to load the OS. Something like EFI partition ...
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1answer
57 views

secure boot - runs fine with .cer - fails with .crt certificate

I have Asus X200MA notebook with Windows 8.1 64bit. I have setup shellx64.efi to run under secure boot. File is signed with my own key (created using openssl) and it runs fine when .cer format ...
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1answer
3k views

After upgrading to Windows 10 from 7 is there a way for you to disable CSM

I was until recently running Windows 7 on my PC, I upgraded to Windows 10 and I know that it can support full UEFI (i.e. with CSM disabled). I believe my PC will be better with CSM disabled, so I ...
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2answers
67 views

Bootloader, uefi, bios documentation

I'm facing incredibly annoying issues with installing kali 2 (not booting + completely messing windows 7 boot) in uefi mode. I went trough alot of topics and solutions and nothing seems to work, ...
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0answers
357 views

Windows 10 UEFI Install on Hp Envy 14 - 1190ea

I'm trying to install Windows 10 and boot through UEFI instead of Legacy BIOS on my HP Envy 14 1190ea. For the installation I have created 3 USB sticks with rufus: The first was configured as "MBR ...
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1answer
716 views

CentOS 7: How to support a 3tb, 4tb, or 5tb drive, as a single partition, without UEFI

My CentOS 7 server is running on a system that is non-UEFI and I need to clone a 500GB HD to a 5TB HD to be used as the new boot drive. What is the cheapest, least time-consuming option to support ...
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358 views

Is there a way to select a custom ROM for virtual machine in Virtual Box?

Using QEMU it is straightforward to select different ROMs either as the main ROM or as a peripheral ROM (i.e. video or network card). Is there equivalent functionality in VirtualBox? I am aware of ...
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1answer
107 views

Cannot get my bootable media to boot on my laptop

My laptop: Acer Aspire Switch 10E My processor: Intel Atom Z3735F (64 bit processor) Came pre-installed with 32 bit windows 8.1 now upgraded to windows 10 I believe this laptop has a 32 bit UEFI ...
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1answer
383 views

can't seem to access uefi bios on windows 10

I have an HP desktop and got windows 10 through the free upgrade promotion, but unfortunately I can't run my new evga GTX 750 TI SC. I heard it my be due to the bios but I've looked everywhere and ...
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1answer
225 views

Installing Ubuntu 15.05 alongside Windows 8.1

I've been trying to install Ubuntu 15.04 alongside Windows 8.1. Windows 8.1 is currently installed, the computer has two drives, both of which (as near as I can tell), use GPT. The first drive is an ...