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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Multi-Boot: How to repair Windows 10 boot after Linux Mint upgrade?

I have an triple-booting iMac (Linux Mint, OSX, WINDOWS 10) with rEFInd installed. The following partitions listed using sudo gdisk -l in Linux Mint 17.3: Number Start (sector) End (sector) Size ...
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What happens if you delete all secure boot variables?

I am attempting to install Kali Linux alongside a preinstalled Windows 10. Secure boot restricts me from booting from USB, so what happens if I delete its variables?
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Gigabyte P34V3 UEFI not allowing secure boot to disabled (FB04) [duplicate]

I'm trying to dual boot Kali Linux and windows 10 at the same time, but the usb I'm trying to install from is not signed with a uefi cert. I found on the web that you should delete "all boot ...
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129 views

Make Windows bootable in both UEFI and Legacy mode?

Some days ago, I installed Windows 10 to a new HDD. Afterwards, I found two boot options in firmware: (1) HDD, (2) UEFI - HDD. I thought the former is boot in legacy mode, the latter is boot in UEFI ...
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214 views

Can I convert a BootCamp Windows installation for UEFI booting?

I had a MacBook Pro 13" 2012 model. It was configured to dual-boot with a BootCamp Windows 10. Recently I moved the stock 500 GB HDD to the optical bay and Windows wouldn't boot anymore, as was ...
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633 views

When UEFI/(Motherboard Firmware), is set to UEFI(not legacy), USB is not detected

When UEFI/(Motherboard Firmware), is set to UEFI(not legacy), USB is not detected When set to legacy, it is detected. It goes without saying that I can't boot from it when the UEFI is in UEFI mode. ...
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1answer
858 views

ASUS Rampage IV Extreme Debug error code 79 and 5A

While working on Windows 10, my desktop computer suddenly rebooted itself and stops to display a POST screen. Computer was running on low profile and has never been overclocked. Computer ...
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2answers
692 views

Configuring UEFI dual BIOS to boot from SSD and access a secondary HDD

Up until recently I've been happily running a (pre-built) Windows 7 Pro box with the following: Gigabyte Z77-D3H motherboard (UEFI Dual BIOS, vF19b) Crucial M4 SSD (120Gb boot drive) Western Digital ...
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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 https://social.technet.microsoft.com/Forums/windows/en-US/aee2b86b-ab1d-409a-b8ca-e0f6a4c90b3c/windows-7-pro-...
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250 views

*VERY* slow boot after changing from MBR to GPT - need to rearrange partitions

I recently changed from MBR to GPT and now my system takes over an hour to boot. I suspect a partition arrangement problem. I'm running Windows 10 on a RAID 5 array. Here is my current partition setup:...
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3answers
605 views

Trying to understand linux support for 4TB hard disk drive on legacy BIOS

I want to add a 4TB hard disk drive for data storage only. My current configuration: Intel Server Board S3210SH (Legacy BIOS, 2009/05/22) Running Arch Linux. Installed in a Crucial 512MX SSD ...
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1answer
64 views

How to boot from USB flash via EFI?

I have setup the following partition table on flash-drive: Disklabel type: gpt Device Start End Sectors Size Type /dev/sdb1 2048 34815 32768 16M EFI System /dev/sdb2 ...
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80 views

Unable to boot Microsoft Surface Pro

I have been given a Microsoft Surface Pro to fix. When you try and turn it on you can see the Surface logo and a series of dots spinning in a circle and that is it. It will sit like that for hours ...
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1answer
29 views

rEFInd lists extra boot options and trying to remove them isn't working

I just got Ubuntu 14.04 to dual-boot with Windows 8.1 (it was quite the process). Anyway, I wanted to use burg instead of grub2 as the boot loader, but that wouldn't work with UEFI, so I am trying to ...
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1answer
60 views

Can't boot Windows 8.1 after update

I'm using linux for my day to day use. Thing is, I don't recall having any problem with my windows installation. It might be that I installed some updates and didn't restart, simply powered off and ...
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0answers
55 views

How can I make a separate boot partition in Windows 7?

I've got an old computer running Windows 7. Windows is installed in BIOS-MBR mode. In the course of trying to dual boot Linux on it, I found that Windows 7 is stored on one partition, with the boot ...
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16 views

UEFI Dual boot: can't see GRUB. In legacy mode boots Linux, in UEFI mode boots Windows [duplicate]

I have a UEFI laptop that came with Windows 7. Now I want to add Linux Mint 17, putting it in dual boot. I put my PC in Legacy Mode instead of EFI mode, shrunk Windows partition and installed it by ...
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203 views

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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1answer
102 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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2answers
70 views

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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70 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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87 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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760 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
71 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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54 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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777 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
56 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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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
182 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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48 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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56 views

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
448 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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1answer
226 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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2k 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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1answer
438 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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67 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
176 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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292 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
1k 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
430 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
436 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
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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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2answers
571 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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1answer
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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259 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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147 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, F8,...