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 do I install Windows 7 32-bit on a UEFI-based system?

I own Acer M5 recently and it comes with 64-bit Windows 8. I need it to run Windows 7 x86. I changed the BIOS setting to boot under Legacy BOOT instead of UEFI mode. I created my bootable USB using ...
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Fedora 19 (you have not created a bootloader stage 1 target device)

I want to install fedora 19 to my HDD but I get errors: you have not created a bootloader stage 1 target device sda6 must have one of the following disklabel types: GPT. I tried: Create 1-2 mb ...
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468 views

Windows 8 preinstall downgrade to Win 7: UEFI problems :/

I have a friend who has a HP Laptop with UEFI booting. Due to some unfortunate human error resulting in an unbootable system, I suggested and he agreed to installing Win7 ("I hate the big tile ...
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1answer
271 views

Windows 8 BIOS can't read DVD drive, want to switch to Linux

I have a laptop, Asus X401U, that came with Windows 8. I've been trying to switch to Linux via DVD, read online tips about how to get to the BIOS, and got stumped after UEFI (my reference is this ...
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1answer
2k views

Install Windows 7 Ultimate x64 as UEFI with GPT

I bought a Samsung laptop (Model: NP350V5C-S0BIN) which came preinstalled with Windows 8. I dont like Windows 8 and want to install Windows 7. I have disabled FAST BOOT and SECURE BOOT. My questions ...
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1answer
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Lenovo Windows 8 EFI restore from image

First time here. I have bought e530 with windows 8 and the first hour of work with it i have a problem. I have ssd with windows 7 which i want to use with my new e530. I have made a sysprep of win 7 ...
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1answer
81 views

What defines the signature of a bootsector?

I've attempted to simplify the question, by getting at the gist of the problem: What exactly makes the "first sector" of a device the "bootsector?" Is the bootsector a logical sector, a physical ...
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2answers
482 views

System does not boot from SSD after re-installation

I have an ASUS S56CM with UEFI firmware, x64, Windows 8. Core i3 processor 500 GB HDD (496 GB and 4 GB marked as boot) 24 GB SSD (18 GB and 4 GB marked as OEM partition) 4 GB RAM The system used ...
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3answers
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Windows 7 - Cloned partition onto 2nd disk (in same machine) won't boot

Notes: using a MacBook Pro 2011, UEFI and GTP. Replaced the DVD drive in my laptop with an SSD (disk 2). Installed Win7 onto the new SSD, which worked fine. Decided to clone Win7 from disk 1 onto ...
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1answer
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How to make bootable Debian usb drive that works on both BIOS and UEFI systems?

I want to make bootable USB drive with Debian and make it bootable on both BIOS and UEFI systems. I've found only separate instructions for BIOS and UEFI systems. Please help me to find a solution.
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2answers
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Timeout option not working on efi windows 7/windows8 dual boot machine

I hav a gigbyte GA-Z77m-D3h mobo and installed Windows 8 Pro and Windows 7 Ultimate on two SSDs (in that order) in EFI mode. Now when I start my computer, I get the windows boot menu (text mode) with ...
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4answers
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Is it possible to make a EFI file to boot Yumi USB flash drive?

2 days ago I've bought an HP Envy laptop, which comes with Windows 8 pre-installed. Before that I were using Yumi USB flash drive with a dozen of boot options to set-up the computers (e.g. ...
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1answer
615 views

HP Split X2 - Clean Install of Windows 8

I would like to install a clean install of Windows 8 Enterprise on my HP Split X2 (it has the new UEFI/Secure Boot). Thus far all of my attempts have been unsuccessful... I've tried Secure Boot ...
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1answer
232 views

UEFI DUET does not boot Ubuntu 12.04

Am trying to boot Ubuntu 12.04 using DUET. I have bootable DUET in one USB flash drive and i have bootable Ubuntu 12.04 in another USB flash drive. After getting into DUET,Through Boot Maintenance ...
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2answers
4k views

How can I disable Secure Boot, without entering in BIOS Setup?

I had UEFI Secure Boot enabled laptop with Windows 8 installed in, the problem is that I restored another OS(linux) and now I cannot enter in BIOS Setup. Is there a way to disable UEFI Secure Boot ...
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1answer
502 views

How do I boot a MBR [FAT(32)/NTFS] USB HDD from EFI without legacy bios?

I am using my external HDD for backups, but for restore you need to boot into the specific software's "restore mode/utility" which is often an CD image, but I preffer to not use CD's and just use USB ...
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1answer
1k views

Unable to load Windows after using EasyBCD to Reset bcd [duplicate]

My windows installation was working perfectly fine until i clicked "Reset BCD" in EasyBCD in Windows 8. After clicking that EasyBCD told me to add Win 8 entry via Add Entry Menu so i did. After ...
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0answers
400 views

I cannot reinstall Windows 8

I recently bought a laptop with Windows 8 preinstalled on it. The laptop is an Acer Aspire V7-482PG-6662, just in case you need to know. I wanted to replace the hard drive with an ssd, so I attempted ...
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1answer
1k views

How to know if windows is installed in EFI mode or not? [duplicate]

I've just got new laptop with Intel Atom N2800 on the board (wiki says that it is 64 bit) from shop with preinstalled Windows 7 starter 32 bit, and I want to install ubuntu 12.04 32 bit (exactly 32 ...
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2answers
1k views

is it possible to use wubi on windows 8 by enabling legacy support on BIOS?

I have been struggling to install ubuntu 13.04 on windows 8. because of UEFI, no existing ways (wubi, etc.) does not work and installing grub2 on the boot is a real pain. I see on the BIOS menu that ...
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1answer
2k views

Convert GPT to UEFI or MBR

I have HDD with Arch linux installed, this disk uses GPT. I would like to convert it to UEFI for using with another laptop (ASUS N56VM), which doesn't support booting from GPT at all (which is ...
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141 views

UEFI ASUS system will not bring up grub menu nor boot F19

Just loaded the Fedora Live Games F19 to a hard drive on an ASUS UEFI system. It won't get to GRUB. I forgot to write the error message, but something about it not being bootable. I can follow up ...
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1answer
821 views

Gigabyte mainboard: How to enable UEFI graphical bios?

I recently bought a new mainboard (Gigabyte GA-970-DS3). On of the advertised features is Dual UEFI Bios. I have heard of these nice graphical Bios interfaces and thought that I would have one too. ...
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1answer
888 views

Windows 8, UEFI, “Supervisor” (BIOS) password, linux?

I've got myself a new lenovo c540 PC and there are Windows 8 OS with UEFI option on and "Supervisor" password on, so it's like a loop, I can't load/install ubuntu from my USB (because BIOS is ...
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3answers
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Battery won't charge on new Asus laptop (ubuntu)

Hi I bought a brand new Asus Q550L notebook from Bestbuy the other day and I removed Windows 8 from it and replaced it with Ubuntu. Now the battery won't charge. It is sitting at 45% capacity, if I ...
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2answers
316 views

Is uefi required to boot from a GPT sdd?

I've spent the past day trying to get GPT to work with my installation/mobo. I have a GA-990FXA-UD3 rev1.0 motherboard, and I'm trying to install ubuntu over two drives, an SSD and a HDD with the ...
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1answer
1k views

How do I install Windows 8 using a GPT Partition scheme?

This question seems to have been asked in very similar form in the past, but I was unable to find a relevant answer her or elsewhere. I am ultimately looking to install a dual boot of x64 Windows 8 ...
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2answers
110 views

Can't download Microsoft malware removal tool

It seems that my computer has malware that prevents me from visiting https://www.microsoft.com/ru-ru/security/pc-security/malware-removal.aspx I tried reinstalling Windows 8 and it doesn't help. Is ...
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1answer
306 views

Dual booting with UEFI secure boot

I have a new laptop that supports UEFI secure boot. My intention is to dual boot windows and ubuntu. Over the past few days I have been researching what the best setup would be and issues I may ...
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0answers
379 views

Supermicro MBD-X9DRL-IF-O won't work

It works before, but after I've changed boot to "UEFI only", set boot device to "Built-in UEFI Shell" and enabled "Above 4G" (and maybe done something another), system stuck on code 92 and I can't ...
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2answers
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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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0answers
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UEFI - New Laptop, Entry in dbx

I have a three-week old laptop with the following entry in the UEFI dbx database: EFI_CERT_SHA256_GUID Is this a reference to the hashing algorithm used for dbx entries, or an actual entry (and ...
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1answer
555 views

What can TianoCore's DUET be used for in a PC?

I've recently become interested in DUET, Intel's UEFI emulator for developers. I'm reading that it can be installed to a hard disk, but what does this make it? Some kind of boot monitor? A virtual ...
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0answers
185 views

Is it possible to flash UEFI(bios) from usb without entering UEFI shell?

The other day I decided to flash my ASUS g75vw laptop's UEFI(aka new bios) with a new version. Something went wrong and after restart I can only see black screen. I can say that the laptop starts, ...
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1answer
2k views

How do I recover my UEFI if it is corrupt?

Okay guys, I did something stupid. But first the back story. I installed Ubuntu 13.04 on my Win 8 Pre-loaded system as dual boot. At this point I could no longer boot Windows 8. I tried using ...
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2answers
4k 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 ...
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2answers
418 views

Chainload EFI Bootloader from grub2 installed on MBR

When trying to chainload a EFI-bootloader from my grub2 I always get an Invalid signature error. According to this question, it happens because my grub2 is installed on an MBR-harddrive. The author of ...
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2answers
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UEFI: Failed to install override security policy

I run the latest Arch Linux image on ASUS Sabertooth 990FX and get this error. Failed to install override security policy. How can i fix it?
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1answer
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Boot ISO image from GRUB4DOS on EFI machines

I failed with loading ISO image (non-distro) from GRUB2 from USB stick, but found the way how I can boot the GRUB4DOS and then load the image from there. However, it doesn't work all the time and the ...
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3answers
7k views

How to reinstall Windows Boot Manager on EFI partition

So I've been trying to install Ubuntu on a second HDD on my desktop, which has W8 installed on a SSD (UEFI-only boot). Thing is, during Ubuntu installation I made the mistake of choosing to install ...
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1answer
316 views

Asus N82J won't boot from DVD

I have a Asus N82J and I want to reinstall Win7. I have a DVD, which boots on other PCs as expected. The UEFI is set to boot from DVD, but it wont find any bootable media. I can not find an option ...
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3answers
1k views

Unable to try or install ubuntu 12.04 and above 64 bit on my Sony Vaio which includes UEFI and Secure boot

First of all the hardware : Core i5 Ivy bridge 3210M 2.5Ghz 6Gb RAM AMD Radeon HD 7650M 750Gb HDD With Windows 8 Single language 64bit preinstalled. And include UEFI and Secure Boot Specific ...
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0answers
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Recover Windows EFI Boot Manager after Grub install

I had Windows 8 installed, and tried to install Xubuntu in another HDD on my desktop. After installation, I could only boot into Xubuntu, and never got into the OS selection menu in GRUB. So I ran ...
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3answers
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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
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How to boot Windows 7 with UEFI, when Ubuntu is installed on Asus Zenbook Prime?

I've tried two days now to get ubuntu AND windows 7 to dual boot... What is the current status? I have completely removed win 8 and installed ubuntu 13.04 to the whole SSD. You may ask, why I have ...
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1answer
309 views

grml liveUSB does not appear as UEFI

I'm trying to repair my broken linux install with grml, since I hear it has EFI support, which I need for what I'm trying to do. Specifically, I need to see a 'UEFI:' prefix before my liveUSB drive ...
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2answers
2k views

Windows 8 deployment from USB

My goal is to deploy Windows 8 via USB to several computers. The systems I'm working with have come with GPT parted HD's. I have set up one the way I'd like it, sysprepped and captured the ...
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1answer
2k views

3TB hard disk displayed as 746GB

in BIOS , UEFI Boot is enabled , ACHI Mode is selected , and the 3TB Hard disk (Seagate ST30000DM001) is installed at SATA Port 3. However, in Windows 7 64-bit, 3TB hard disk is displayed as 746GB, ...
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2answers
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Driveimage XML : unable to retrieve drive layout

DriveImage fails to execute "Drive to Drive" operation. Since the 1TB hard disk is dying, I decided to move the System Drive to newly bought HDD. It said, unable to retrieve drive layout. The source ...
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1answer
172 views

Can I patch the bugs in my laptop UEFI implementation?

I have an Asus X54H-SX137D laptop, with a K54L mainboard, which supports UEFI booting (AMI Aptio 4.5). I was using BIOS mode, and all functions were working well. In order to reap the benefits of a ...