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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How can I repair the Windows 8 EFI Bootloader?

I installed Windows 7 and Windows 8 in EFI mode on a hard disk some days ago. Today, the bootloader got missing/corrupted. I currently have the Windows 8 installer on a flash drive and tried using ...
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2answers
228k views

Asus UEFI/BIOS options - How to boot from DVD?

I just bought a new PC and the default installed OS is Windows 8. I want to install Windows 7 but when I go into the boot options screen I only have one option: Windows Boot Manager I can't find my ...
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5answers
9k views

Is there any way to boot Windows 7/8 using BIOS on GPT?

I'd like to know if there's a method to get Windows 7 or Windows 8 Developer Preview to install to a GPT disk on my traditional IBM PC BIOS setup. Windows 7, of course, rejects my GPT partition, ...
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3answers
42k views

How to tell if windows 7 installer boot in EFI or BIOS?

I have a windows 7 64bit installation USB. I want to know if the windows 7 installer has booted into EFI or BIOS mode. I googled and found a solution here ...
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5answers
29k views

How to know if my BIOS supports UEFI?

I recently bought a new Dell notebook for my girlfriend and I want to know if the computer comes with a UEFI BIOS, unfortunately I didnt find any information in the manual or on Windows, is there some ...
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3answers
6k views

Is is possible to update BIOS to UEFI?

I just ran the Windows 8 Upgrade Assistant on an older machine (just for fun) and was informed that due to lack of UEFI firmware, Secure Boot would not be supported. What I want to know is, is it ...
25
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2answers
109k views

What is the difference in “Boot with BIOS” and “Boot with UEFI”

Now Windows 8 supports the UEFI bootloader and I have read that its different from the BIOS, but it's unclear to me after many searches on the Google. Some points in mind are below As we all know, ...
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4answers
47k views

Clean install of Windows 7 Pro 64-bit on a UEFI with GPT laptop?

I’m currently pulling out hairs about a problem with my wife’s new Samsung Book 9 laptop. it comes preinstalled with Windows 8. She wants Windows 7 Pro. I’ve board a Windows 7 Pro 64-bit for her and ...
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2answers
27k views

How do you install Linux alongside Windows 8 without corrupting the Windows 8 boot configuration?

In order to install Linux Mint 14 alongside Windows 8 I disabled UEFI and booted to a flash drive with the Linux image. I installed Linux, restarted the computer, and the GRUB boot loader appeared. ...
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2answers
15k views

What are the advantages to install Windows 7 with UEFI?

I just received a Dell Precision M4600 and looking at BIOS it seems it has UEFI support but it is disabled. So due to the fact that I need to reinstall Windows 7 from scratch, do you suggest to ...
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1answer
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If I buy a computer with Windows 8 and Secure Boot, will I still be able to install Linux?

I've heard a lot about how Microsoft is implementing UEFI Secure Boot in Windows 8. Apparently it prevents "unauthorized" bootloaders from running on the computer, to prevent malware. There's a ...
12
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1answer
143k views

How do I boot my Samsung laptop from a CD/DVD?

I have a Samsung Series 3 laptop and want to boot from an Ubuntu Live CD. When I press F10 to pull up the BIOS/boot configuration, I don't get an option to boot from the CD. Similarly, in the BIOS, ...
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4answers
6k views

Is it possible to downgrade an OEM Windows 8 install to Windows 7?

I recently purchased an ASUS K55A. Like all Windows 8 machines, it come with a UEFI feature called Secure Boot. This basically makes sure that the laptop won't load anything other than the Windows 8 ...
22
votes
2answers
26k views

Make UEFI, GPT, Bootloader, SSD, USB, Linux and Windows work together

I like to use the latest hardware and the latest software; thus I have a Laptop (Lenovo X220) with UEFI instead of BIOS an SSD instead of an HDD GPT partitioning scheme instead of MBR USB to boot ...
25
votes
4answers
75k views

How to reinstall GRUB2 EFI?

After successfully updating my bios, something went wrong and I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a SATA: ...
7
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1answer
16k views

Windows detects GPT disk as MBR in EFI boot

This disk is OCZ VERTEX 128GB SSD. It is formatted as GPT from OSX. The disk layout is, /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: ...
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2answers
5k views

Windows (using UEFI boot on GPT disk) will no longer boot after adding an MBR hard disk

I have recently installed Windows 7 64 bit on a new SSD using UEFI boot and GPT. The system worked fine. After adding my old system HD to the system (that uses MBR), Windows will no longer boot ...
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2answers
6k views

What are the disadvantages of not using UEFI boot?

I bought a Samsung series 9 laptop with 64-bit Windows 8 pre-installed and wish to install Linux (probably Ubuntu 13.04 when it comes out ext week, but also considering mint 14). Now there have been ...
4
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6answers
39k views

How to CLEAN INSTALL Windows 7 Professional 64Bit on Dell Inspiron 15R Turbo / Special Edition laptop?

I recently bought a Dell Inspiron 15R Turbo/Special Edition with following configuration: 3rd Generation Intel® Core™ i5-3210M processor, Windows 8 Single Language, English (64bit), 8GB 2 DIMM (4GB ...
5
votes
3answers
14k views

How to create an UEFI bootable USB stick from an ISO

I have an ISO image of my backup solution's recovery cd. When I burn the image to a CD-ROM, I can boot from it in UEFI or normal mode without problems. Unfortunately, this is no solution for my ...
3
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2answers
3k views

No discs found when trying to install Windows 8 with UEFI

I have a Vizio Notebook (CN15-A5). It came pre-installed with Windows 8 x64 and is taking advantage of UEFI out of the box. The BIOS (APTOS AMI) is in Secure Boot mode with the OS selected as "Windows ...
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4answers
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Will my computer be able to run Windows 8 without UEFI?

Will I be able to run windows 8 on my system, even though I am not using UEFI? Is there a work around if I don't want to use UEFI?
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1answer
3k views

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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2answers
768 views

Updating BIOS on DOS

I am using a Gigabyte GA-Z68MA-D2H-B3 motherboard on my computer. I wanted to migrate from Award BIOS to UEFI. I downloaded the binary file from the Gigabyte product page, but when I tried to run, it ...
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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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2answers
5k views

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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2answers
10k views

Boot into Windows 8.1 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 F8 would do the trick. Apparently my computer is using ...
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3answers
5k views

How can I add a second hard drive to a previously configured UEFI/ACHI Windows 8 machine?

Recently purchased a new Windows 8 PC. It came with one hard drive. I want to a second hard drive to it. This second hard drive is my data hard drive from my previous computer. However, I have run ...
0
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2answers
4k views

How to make grub2 chain-boot Win8 after upgrading Fedora18 to Fedora19?

The story I have Lenovo IdeaPad U310 with 24gb SSD, 500gb HDD and UEFI system. I flashed it with EFI from U410 for more info ...
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2answers
7k views

Restore Windows 8 EFI after installing Ubuntu EFI

I installed Windows 8 using EFI, and later on I installed Ubuntu using EFI as well. As I always do, I had trouble with the bootloaders. Ubuntu replaced the bootloader on the EFI, which I was very well ...
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votes
1answer
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Why would an EFI “BIOS” update break the EFI boot manager?

After successfully updating my P8H67-m pro with the latest "bios" version I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a ...
4
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1answer
7k views

How do the 'EFI system partition' and UEFI *.efi files relate?

I read that there needs to be an EFI system partition. The EFI System partition is a partition on a data storage device that is used by machines that adhere to the Extensible Firmware ...
14
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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 ...
3
votes
1answer
11k views

UEFI boot options gone

I ran into some issues booting Windows after trying to make a complete backup of the disc. After searching for information about some of the error codes, I found advise to change some BIOS settings, ...
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vote
1answer
5k views

Adding Windows 7 boot entry in an EFI bootloader

Long story short, I use EasyBCD and accidentally delete the Windows 7 boot entry from the boot manager. My laptop is Asus N46VZ and it uses EFI. I want to restore the bootloader by adding the windows ...
9
votes
4answers
14k views

How can I use TrueCrypt under windows 8.1?

I know that TrueCrypt doesn't support windows 8 because some systems have UEFI enabled. It seems that if UEFI is disabled or Windows 8 is installed on an non UEFI system TrueCrypt just works fine in ...
7
votes
2answers
9k views

Windows 7 + Ubuntu dual boot + UEFI BIOS

I received a new Lenovo T420 laptop with Windows 7. The disk now contains: a hidden SYSTEM_DRV boot partition (1.17GB, 400MB used). I'm guessing this is the UEFI partition; the laptop comes with ...
6
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2answers
4k views

Linux on UEFI - how to reboot to the UEFI setup screen like Windows 8 can?

makeuseof.com explains that Windows 8 certified hardware has a new way to enter the UEFI setup screen (equivalent to BIOS). From How To Access The BIOS On A Windows 8 Computer: No longer do we ...
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2answers
3k views

Windows 8 changes boot order

I installed Windows 8 and Ubuntu 12.10 on a 3TB GPT disk in UEFI mode. Both can boot up OK. Both operating systems created their ntries in the UEFI boot menu, there's an "ubuntu" and a "Windows 8" ...
3
votes
3answers
5k views

Windows 8 Not Shutting Down Properly With Fast Start-Up Enabled

While Fast start-up is enabled, on turning the computer off (shutdown) the computer idles for about 5min after logging out/screen turning off. It then turns off. On returning into Windows I receive ...
2
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2answers
9k views

How to restore UEFI on a Windows 8 preinstalled laptop

I will explain things as well as I can, but even after a bunch of reading, I am still not too up on UEFI. I generally deal with high level software. So I have a preinstalled Windows 8 system that ...
2
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2answers
1k views

Can UEFI settings brick new laptops?

See closed question - this is a less localised version of the same question. Summary: changing CMS support in BIOS after attempting dual boot Windows 8 and Ubuntu 12.10 bricked my laptop. While ...
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vote
3answers
2k views

Do I need UEFI enabled in BIOS for a 4TB external, non-boot disk?

I just want to use a 4TB drive to store data. Do I need to do anything about UEFI in BIOS? When I Google, it always seems to be talking about boot disks larger than 2TB, so I am not sure if this is ...
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1answer
5k views

Grub2 fails to chainload Windows 7 with error “invalid signature”

I've built a new UEFI 64-bit system with both Windows 7 and Ubuntu 11.10 installed (on separate hard drives). I'd like to be able to boot Windows 7 from the grub menu, but I have so far been ...
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1answer
2k views

Does Windows 8 Consumer Preview already support installation on UEFI-capable systems?

I recently bought a new Acer laptop that I believe already has UEFI, so I just want to know if I install Windows 8 Consumer Preview on it, will it be installed as a GPT partition using all UEFI ...
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1answer
1k views

How to re-sign the Windows boot loader to re-enable secure boot on an HP laptop?

I just purchased a "HP Pavilion 15-B055ca (C7C80UA#ABL) Ultrabook" from my local computer store the other day, as well as an SSD hard drive. I removed the original 500GB HDD, installed a 120GB SSD, ...
4
votes
3answers
4k views

Dual boot Windows 8 and Ubuntu?

I've installed Windows 8 on a machine (Lenovo X220 laptop) with Ubuntu 12.10 already installed on another disk. I am guessing that Windows 8 has convinced the laptop to switch to UEFI boot (rather ...
3
votes
2answers
5k views

UEFI vs non-UEFI options in boot menu

I just built new PC based on Asus Z87-Plus motherboard and in BIOS boot menu I now have my removable devices listed twice - once as a device itself and once with "UEFI: " prefix. It looks like this ...
2
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2answers
10k views

Enabling UEFI mode in BIOS after having set it to CSM mode, and not being able to get back into BIOS

I set my BIOS to CSM only mode after being unable to boot into windows after upgrading it to 8.1 and not being able to boot from a USB stick to repair it. I ended up putting in a formatted SSD, and ...
2
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2answers
981 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 ...