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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System does not boot DVD drive in secure boot/UEFI mode

I had to disable Secure Boot and enable Legacy Support to be able to boot a Windows 8.1 64bit DVD from the CD drive in the BIOS menu to install Windows. Is there any reason why this happens? Is there ...
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Installing Arch Linux, issue with `modprobe efivars`

I am trying to install Linux on my new Vaio Pro which is an adventure in and of itself. I am trying to install Arch Linux with UEFI. I am following this tutorial (though I am using newer 2013.11 Arch ...
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Install Ubuntu 12.04 in UEFI mode on a HP Pavilion dv6-6c40ca

I have recently (as of July 2012) bought a HP Pavilion dv6-6c40ca laptop. It came pre-installed with Windows 7 on an MBR. I installed Ubuntu 12.04 on it on a GPT partition in what I think is BIOS ...
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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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How do I disable digital signature checking for Windows 8.1 EFI files?

I'm trying to patch my bootmgfw.efi file to change the background color of the BitLocker password prompt and other Windows bootup screens. I found the values to search for and replace for the color (...
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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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Boot into Windows safe mode with UEFI BIOS

My brand new Windows 8.1 computer is dead and only shows a cursor on black screen when booting. So I need to boot into safe mode. I thought pressing F8 would do the trick. Apparently my computer is ...
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Windows 8.1 UEFI x64 & Windows XP x64 Dual-Boot

I want to add option to boot in XP into the Win8.1 boot menu. So I have 2 drives: On the first one I have installed Windows 8.1 x64 UEFI; And on the second - Windows XP x64. Following is what I ...
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Does the EFI boot partition need to be the first partition?

I'm trying to install kubuntu 13.04 and debian wheezy on my laptop with UEFI on. The installation goes fine but when I reboot it shows "no OS found". Could it be because I already have windows 8 on /...
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Windows 8 Secureboot: How do you bootup from another device such as cd/dvd drive or usb flash etc.?

On PC's and laptops running an older OS, this is just a simple matter of going into the BIOS and setting the boot sequence and putting the boot cd/dvd in the drive. In many cases you can even just hit ...
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475 views

UEFI Windows 7 Installation won't boot if Ubuntu's MBR drive is connected

I have installed Windows 7 in a UEFI enabled motherboard - however it won't boot when a Ubuntu MBR drive is connected. I've read a little about the incompatibilities between these two, but would like ...
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Laptop not booting from any bootable device (UEFI broken?)

I was trying to install Debian in a dual boot with the already installed Windows 10 on my laptop. Now when I boot up the PC it shows the Dell logo and the options to press F2 for Setup and F12 for ...
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196 views

Installing Windows 10 on a Samsung 850 EVO SSD gets stuck at “Copying Windows files (0%)”

Recently, I acquired a Samsung 850 EVO 120 GB SSD to use for OS (Windows 10) installation. After creating a bootable USB installer (using Rufus) and booting from it, I can do the following things: ...
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72 views

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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5k views

Move Windows 8.1 installation to another PC - is it possible to avoid a re-install & just move the hard drive?

Last year I've installed a clean copy of Windows 8 (later upgraded to 8.1) on a new laptop. This process was challenging because the laptop included Windows 8 pre-installed (plus bloatware), and my ...
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375 views

Attempting to install Windows 8.1 as secondary OS, misdetects EFI partition

Currently I have Arch Linux installed as my primary OS, and wish to install Windows 8.1 as a secondary so I may utilize certain special hardware (a capture card which has no Linux drivers at the ...
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2answers
5k views

Lenovo G505s and “Default Boot Device Missing or Boot Failed.”

I am Using Lenovo G405s and running Windows 8 on my laptop, and whenever I turn on the laptop this error pops up - SATA HDD : WDC WD5000LPVT-24G33T1 boot failed SATA ODD : MATSHITA DVD-RAM ...
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380 views

Prevent chainloading by grub after rEFind

I triple booted my Macbook 4,1 with Mac OSX 10.5.8, Lubuntu 14.04 and Windows XP SP3 and installed rEFInd as my bootloader. Now what basically happens is, first the Mac bootloader loads invisibly, ...
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959 views

UEFI bootloader

Issue is that EFI systems only allow you to boot using FAT32. I have to deploy multiple images of Windows 8. My WIM image is larger than 4GB and unable to transfer to a FAT32 partition. I've been ...
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3k views

Unhide a EFI System partition

I don't know how I come to this but the partition I use to install Windows 7 64-bit is hidden. It is also a EFI System partition (I saw this using the Disk Management tool). Since the Windows ...
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737 views

Suspend only works once after full power cycle with Asus P8Z68-V PRO GEN3

This one is strange. I can't seem to get suspend working more than once per power cycle. When I say "power cycle," I mean the only way to get one proper suspend is to cut power from the power supply ...
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2answers
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Difference between UEFI and BIOS architecture

How does the UEFI offer an advantage over BIOS architecture? Why is it so difficult install Linux(read Ubuntu) as a dual boot option on a UEFI Windows 8/8.1 PC? I say it's difficult because of this ...
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UEFI exFAT partition?

Is it possible to boot from UEFI on an exFAT partition? I've been reading that it should be FAT32 and not NTFS, however I was able to boot SteamOS from an exFAT formatted USB - notably with errors... ...
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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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Installed/Updated Windows 8 UEFI after Ubuntu - Restore GRUB

So, I had a laptop with Windows 8 OEM copy obviously installed in UEFI configuration with GPT partitioning. A little while ago I installed Ubuntu 13.xx(the latest one) alongside it and GRUB ...
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What is UEFI? How do I know if I have it? [duplicate]

Possible Duplicate: How to know if my BIOS supports UEFI? Just watched the Win8 keynote thing, and seemed like the fast boot times required something called UEFI(?). What is that? How do I ...
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562 views

what is the purpose of UEFI SecureBoot?

I heard that new computers will have a "secureboot" feature built in, and that it's supposed to keep "unsigned code" from booting. I haven't seen any issue with a possibility to boot the wrong OS,as ...
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336 views

Motherboard battery and clock

my girlfriend just built her new PC on her own. Everything is fine except that the motherboard (890GX Pro3) doesn't remember settings, boot preferences and datetime every time she turn the power ...
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2answers
1k views

What can an end user do with efi or uefi?

Other than greater support for hardware, what advantage or use could an end user (read: NOT an expert) do with an EFI shell or EFI BIOS? I've seen the shell once on my MacBook Pro, but it seemed ...
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168 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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603 views

What configurations are different between BIOS and UEFI “AFTER” OS boot?

I tried installing Ubuntu in UEFI mode to VirtualBox. The installation was fine, but after rebooting, OS started correctly while the graphic environment didn't start. This problem itself was reported ...
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636 views

Disk partitions dissapear after installing Ubuntu

I have a 2TB HDD and first installed Windows 7 in a 1.8TB partition, leaving near 200 GB of unused disk to install Ubuntu in the future. Yesterday I did that, creating 4 partitions: 512 MB ...
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Will Windows 8 install on MBR?

So will Windows 8 install on a disk which is of partition scheme MBR? Also, can there be anything like MBR and UEFI? (Isn't it GPT + UEFI?) Do the First Generation of Intel Core (i3,i5,i7) support ...
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Gigabyte GA-Z77X-D3H MB problems

I installed a new system last week. I've some issues with it. The system consists of a: Gigabyte GA-Z77X-D3H with F9 BIOS (latest) Intel Core i5 3570K proccesor Sapphire Radeon HD7850 2x 8GB ...
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190 views

Make existing Windows 10 installation bootable from USB

I bought a new laptop (Lenovo Thinkpad) which came with Windows 10 installed. I threw out the hard disk, replaced it with an SSD and installed Linux on it. Now I put the old hard disk into an USB ...
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1answer
6k views

How to test whether Windows 10 was installed with UEFI?

I need to decide whether it is more straightforward to create a bootable Ubuntu drive in UEFI or standard BIOS. I do not want to create or install it through any more ambiguous route than necessary ...
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1answer
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Install Grub2 (with EFI-IA32 support) to the ESP partition from within Windows 8.1 (32-bit) - Bay Trail tablet

This is a very complicated idea, and it's been stuck in my head for a while now, so bear with me. In this question, when I say "Grub2", I am referring to the "EFI-IA32 version". The device I will be ...
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1answer
785 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
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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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Does there exist a native UEFI disk/partition manager?

UEFI has the infrastructure to support complex applications at boot-time. One of the most urgent needs of the hour is a UEFI application for GPT disk management. A lot of partition management cannot ...
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How to boot windows after uninstalling ubuntu?

I am using windows 8 system and I tried to install ubuntu by making a separate partion. But after deleting the partitions created for Ubuntu, it is still trying to load ubuntu and not windows. If I ...
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1answer
12k views

Windows boot manager and two hard disks

here's my situation: I had an HDD with Windows 8 installed (UEFI mode). I bought a SSD and wanted to do a clean install of Windows, so I thought that disabling the HDD and leaving the SSD as the only ...
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3answers
2k views

Just installed Fedora 18 and computer is not booting

After some initial trouble, I was able to install Fedora 18, but Had to Disable Secure Boot, disable Fast Boot, and Enable CSM. Side Note: I was reading that by Enableing CSM I was not going to be ...
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How to access the GUI of UEFI on ASUS Laptops?

My ASUS Laptop has UEFI and GPT Paritions running on Windows 7 x64. I've heard a lot about these GUIs. How do I access them? As using the F2 button simply brings up the plain old BIOS UI.
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Lenovo Thinkpad T450s: “Error: The non-volatile system UEFI variable storage is nearly full.”

A customer of mine is using a Lenovo Thinkpad T450s since something like a year. The machine is running Debian jessie, with a kernel out of jessie-backports, right now 4.5+73~bpo8+1. The latest UEFI ...
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Repair Ubuntu boot loader from Windows

My windows 8 is installed on the C drive. I installed ubuntu on the D drive. By mistake I chose the boot loader to load from the C drive while installing ubuntu. Then, restarted and it directly booted ...
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1answer
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After installing August 2015 updates, Windows 10 endless loop - light blue BSOD “BAD_SYSTEM_CONFIG_INFO” - that cannot be repaired, reverted, or reset

I made a dumb decision and opted to accept Microsoft's offer to upgrade from Windows 8.1 Pro to Windows 10 "for free," which is only true if you don't consider your time or ability to start your PC ...
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1answer
147 views

Is there any advantage to a particular boot order when using UEFI?

Just built a system with motherboard that supports the UEFI. I didn't realise what it was at he time and was interested to know why it appears to be attached to a 1TB HDD. I have in my system room for ...
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1answer
1k views

Setting up VHD Boot for Windows 8.1 32-bit OS on 64-bit UEFI

I have a Surface Pro 3 that natively runs Windows 8.1 64-bit. By extension, the UEFI on the device has a 64-bit boot loader. I am attempting to setup the device to allow a VHD boot into a Windows 8.1 ...
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Install Windows 7 after Ubuntu: Cannot install because of GPT partition

I'm trying to install Windows 7 on a NTFS partition after installing Ubuntu 14.04. But it says that I'm using a GPT partition. The solution I found was to erase everything, then install Windows 7 then ...