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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A UEFI entry is corrupt. How do I fix it?

I uninstalled Windows 10 from my triple boot setup to be left with dual boot but the UEFI entry for it stayed after I removed the drive, so to remove it I used easyUEFI to remove the entry but it just ...
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2answers
49 views

Totally remove Windows 8.1 from Toshiba Satellite laptop

I have a legacy app that will not run under Windows 8.1. I want to load Windows XP but need to totally wipe out Windows 8.1. I have tried going into advanced settings in the BIOS and changing UEFI to ...
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0answers
685 views

Does unetbootin work in win 10 with UEFI mode?

I would like to install Ubuntu 15.10 using unetbootin and no usb key -thus using unetbootin with Hard Disk (frugal) install mode. However nowhere in the documentation could I see if unetbootin will ...
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1answer
15 views

Cancel Boot Camp automatic boot

I wanted to install Windows using Boot Camp, I gave it the ISO image and partitioned the disk but decided not to pursue after reboot. Now everytime I power up my MacBook Pro it automatically boots to ...
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0answers
50 views

Windows 10 boot error

I recently created a bootable USB it using Rufus on a Windows 10 laptop in order to install Windows 10 add alongside Ubuntu for a dual boot on my desktop. I created the USB in Fat32 format. My empty ...
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0answers
38 views

Why isn't my system booting in UEFI mode?

I recently attempted to install Windows 10 as a dual boot alongside Ubuntu 14.04. I used WinUSB to create a bootable drive. I booted into the USB, but when I attempted to select the empty NTFS ...
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1answer
81 views

UEFI firmware corrupt? Neither ethernet nor wireless controller detected anymore

The problem My computer is a 64-bit Acer Apsire V5-572G currently running with Arch Linux. I wanted to use some programs that dont run with Wine. So i set up a Windows-To-Go on an external hdd. Upon ...
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1answer
135 views

How to enable usage of both onboard and dedicated graphics cards?

When I bought my computer a year ago, I somehow managed to change some setting(s) to allow me to use both graphics cards at the same time. Recently the dedicated one flamed out, so I took both my ...
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1answer
41 views

Is it possible to select which system to boot before rebooting, on a multi-boot UEFI system?

I'm wondering if there's a way to have a computer with UEFI and two different OSes installed (Windows 10 and Linux Mint 17.x in my case) where you don't have to wait for the system to shut down in ...
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0answers
20 views

Zotac Nano uses lots of power while on standby and accesses USB stick - why?

I have a Zotac Nano mini PC with a UEFI firmware here. I have noticed that when on "standby" it consumes a few Watt of power. To illustrate: We start with the power supply disconnected (the power ...
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30 views

Upgrading a USB installed Windows 10 on a Mac

I have Windows 10 installed on external SSD connected to my MacBook Pro 13 trough USB. I'm trying to upgrade Windows 10 and I keep getting an error "Windows can't be installed because this PC has an ...
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0answers
123 views

Why does the FreeBSD kernal crash on UEFI boot?

I recently downloaded the FreeBSD 10.2 distribution from the official website; I used the 'FreeBSD-10.2-RELEASE-amd64-uefi-memstick.img.xz' file. I used MS ImageWriter to image a USB and proceeded to ...
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2answers
70 views

Not seeing Boot order change Option

I'm trying to install Ubuntu in my Dell Inspiron 5548 laptop and its giving me real stomachaches! Windows 10 is in UEFI mode. So I have to install Ubuntu also in UEFI mode. As such, I disabled ...
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3answers
1k views

Windows 10 Can't Install from USB Disk to UEFI

I recently put an SSD in my computer. Today, I tried to install Windows 10 to it using an installer disk, and it caused the operating system on my HDD (also Windows 10) to be unable to boot. (Also, ...
0
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1answer
155 views

Windows 10 PC always boots to BIOS after failed Ubuntu dual-boot setup + using boot-repair tool - OS reinstall?

I bought a PC with Windows 10 on it, which has a SSD and HDD drive. I attempted to create a multi-boot setup with Windows 10 and Ubuntu 14.04 (the Windows folder is on the SSD, and I wanted the Ubuntu ...
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3answers
95 views

Do I have to reinstall UEFI Windows in Legacy to dual boot with another Windows in Legacy?

I currently have Windows 10 in UEFI installed on my laptop and I can't install Windows 7. I want both OS in dual boot but I can't get the boot USB to work properly in UEFI. I then proceed to disable ...
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1answer
590 views

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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2answers
2k views

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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5 views

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 ...
0
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1answer
96 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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0answers
124 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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2answers
362 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
559 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
476 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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1answer
746 views

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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1answer
182 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 ...
3
votes
1answer
901 views

Windows 10 takes 2+ hours to boot

I am running a Dell T7600 workstation with RAID 5 configuration on a Perc 310 adapter running Windows 10. I just converted my partition from MBR to GPT. I changed the Bios to boot in UEFI mode. It ...
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3answers
313 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
60 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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0answers
77 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
26 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
58 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
49 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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0answers
15 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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193 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
92 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
67 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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106 views

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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0answers
61 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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0answers
82 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
617 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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1answer
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 ...
0
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1answer
61 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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2answers
50 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
517 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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34 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
153 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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0answers
45 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 ...