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 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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27 views

4T RAID 0 Partitioning issue

I am building a new workstation 1.2T 10K SAS X 4 for Win 7 Pro SP1 x64 I must use RAID 0 for this workstation. What I would like to have is C = 500G D = rest of spaces So BOIS based system with ...
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0answers
26 views

Windows UEFI repair

I have an Acer Aspire 571-series laptop that came with Windows 8 preinstalled (now upgraded to 8.1). Last week I installed the OS X Yosemite (hackintosh) to triple boot with Windows and Ubuntu, and ...
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0answers
59 views

Flash 64-Bit UEFI on Intel Baytrail Tablet

Is it possible to flash a 64-bit UEFI on an Intel BayTrail Tablet which currently has a 32-Bit UEFI? I tried to install a 64-Bit Ubuntu 14.04 (which surprisingly worked) but after the installation my ...
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3answers
70 views

Disable Secure Boot to install Windows 8.1 in UEFI mod via USB stick [duplicate]

I'm trying to install windows 8.1 using a USB stick from UEFI Mod. I used Rufus to format the USB stick as "GPT for UEFI". The problem is that my PC can boot in UEFI mode only if I turn Secure Boot ...
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0answers
15 views

How do I create the Microsoft bootloader on the EFI partition? [duplicate]

I have Linux and Windows installed in a dual boot configuration. The Windows bootloader is corrupt. I want to reinstall it using the Windows recovery partition but I do not know how to boot to it ...
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1answer
52 views

Unable to boot Ubuntu 14.10 on Toshiba Satellite C55D with UEFI boot mode

I am trying to get Ubuntu 14.10 to boot on my Toshiba Satellite C55D-B5212. I have UEFI boot mode and Secure Boot enabled. The Ubuntu live USB stick booted without issues and the install seemed to ...
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2answers
57 views

Windows 8 Tails Uefi to legacy and legacy to uefi

Recently I downloaded tails os, and want to boot it from usb stick. My pc is running in uefi mode, and I heard that it's possible that windows 8.1 won't work after changing to legacy. How can I ...
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0answers
48 views

UEFI not recognizing USB 3.0 drive

I would like to run Windows To Go on an external USB 3.0 drive and whenever it is plugged into my laptop, Windows should run instead of Ubuntu 14.04. I successfully installed and configured Windows ...
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2answers
38 views

How to boot to Windows 8.1 in UEFI boot mode?

I recently installed Windows 8.1 from a USB drive. In order to boot from the USB drive, I had to disable secure boot in the BIOS and switched to Legacy boot mode (from UEFI boot mode). After the ...
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2answers
70 views

Booting a BIOS bootloader from UEFI mode

I have a Linux setup that I boot in UEFI mode with GRUB. I want to try out OpenBSD, which unfortunately doesn't support GPT or UEFI yet, so I partitioned a drive with a traditional MBR table and ...
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1answer
57 views

How to install Windows 8 without flash drive and dvd? GPT/UEFI

I have my new SSD, on which I want to install Windows 8.1. I have an iso image. So what I normally do when I use MBR on the drive: Create partitions Extract iso to one of the partitions Make that ...
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2answers
47 views

How to register/convert a restored linux OS (bios) to EFI booting

First let me explain my current set up. I recently scrubbed my two main drives and converted them to GUID. On the primary drive (sdb in my case) I have created an EFI boot partition (ESP) on ...
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1answer
90 views

Arch Linux UEFI bootable usb installation media

I want to install Arch Linux in UEFI mode, but I fail at booting the installation media in UEFI mode. What I have done so far is: Create msdos partition table on usb key OR create gpt partition ...
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2answers
86 views

Run Linux dist from bootable USB on Surface Pro 2

I'm having issues booting from USB on my Surface Pro 2 with win 8.1 and UEFI. Tried creating bootable USB using LinuxLive and a Linux dist. Also tried creating bootable USB with Easy2Boot, and adding ...
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1answer
59 views

rEFInd boot-manager - 'volume' as GUID?

How can I properly set a volume setting on a boot option in 'refind.conf' by using an GUID of it's partition? My current setting is but 'refind' fails telling me that the specified file was not found ...
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0answers
9 views

Thinkpad Edge E545: Failure to load kernel through efi

Now this is an issue I've been battling for a long time ... I am trying to make a proper UEFI dualboot system, the problem is I cannot seem to load gentoo kernel either simply by using EFI stub (also ...
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1answer
22 views

How to copy/move files between filesystems using UEFI shell

How can we move files between filesystems using UEFI shell. If i try: fs0:> mv somefile fs1: I get an error that source and destination should be on the same filesystem. How can we workaround ...
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1answer
61 views

Windows boot manager overwrites my boot order uefi bios samsung

In the UEFI bios in my samsung ativ boot 5 laptop I have 'UEFI OS' (which is Grub2, Linux etc..), 'Windows Boot Manager'(Windows 8.1). I want to change boot order to: 1. UEFI OS 2. Windows Boot ...
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2answers
80 views

Windows 7 installation disc fails to boot properly on UEFI

Whenever I try to install Windows 7 onto my laptop, the boot process simply stops and hangs at the boot splash. No error is given, and the splash continues to animate. However, it never progresses ...
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2answers
39 views

RAID 1 accidentially booted in AHCI mode

I have two Samsung 840 EVO SSD's in RAID 1 (Asus P87-Pro and Intel Controller) with Windows 8.1 Pro on it. After a BIOS update, apparently all BIOS settings was reset, which apparently changed the ...
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0answers
70 views

I can't access BIOS anymore on my tablet

I have an Onda v116w dual OS tablet. Last week I accidently deleted a Windows boot manager file while trying to reset the boot order. Ever since I’ve been struggling with my UEFI settings to convince ...
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0answers
59 views

Can't enable CSM mode or Fast Boot

I have an ASUS UX302LA laptop and its been working great. A little while back I was loading different OSs on it, and had to disable Fast Boot and Secure Boot Control, and enable CSM mode. After a ...
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1answer
50 views

Laptop reacts to power cord as if it was the power button

I have a Lenovo Thinkpad Carbon X1 which has started to misbehave recently. The basic symptoms are that it Can't be relied upon to start when pressing the power button (not sure if it never does, or ...
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1answer
50 views

Lenevo G580 Model 20157 can't open bios menu

I am facing problem in opening the bios menu by pressing the system rescue botton which bring up the CMOS menu under which there is bios menu where I can change the UEFI/Legecy mode or change the boot ...
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0answers
65 views

How to install Windows 7 to UEFI system?

I have a new HP laptop that came with Windows 8. I want to do a dual-boot with Windows 7. I have Home Premium x64. I disabled Secure Boot, and the laptop now will start to boot the Windows DVD but ...
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1answer
68 views

How to boot Windows from new hard drive

I just bought a new, bigger hard drive. Currently I'm running Windows 8.1 with a 1TB hard drive. I just bought a new 3TB hard drive and installed it in my computer. Everything seems OK and Windows ...
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0answers
17 views

How to boot Windows from new hard drive [duplicate]

I just bought a new, bigger hard drive. Currently I'm running Windows 8.1 with a 1TB hard drive. I just bought a new 3TB hard drive and installed it in my computer. Everything seems OK and Windows ...
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0answers
52 views

Access BIOS on UEFI-based computer

I'm having issues with some hardware, and I called the hardware company's tech support. The support person told me to make a change "in the BIOS, not the UEFI". He seems to think there is a way to ...
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1answer
297 views

Asus X99-Deluxe - Can only boot with the “Clear CMOS” button after cooler installation

It sounds like I have similar symptoms to this question, but this only started happening after swapping out a heatsink for a cooler. To be precise, the system will only boot if I press the clear CMOS ...
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1answer
51 views

HP laptop - DVD boot difficulties

Yesterday, I bought an HP ProBook 4330s. It had Linux on it. I tried to use a bootable Windows DVD to reinstall the system but it didn't work. I changed the priority in BIOS, the CD/DVD is first on ...
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0answers
223 views

Cloning a SSD using GPT not working (Clonezilla)

I am using Windows 8.1 Pro installed on a 128 GB SSD, partition-table is GPT. My Asus Mainboard uses UEFI and i installed windows 8.1 as a uefi installation. Therefore the first boot device is ...
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319 views

Windows 8.1 Re-Installation on Acer Aspire - Key Issue

On Acer Aspire V3 model, Windows 8 recovery partition could not complete a fresh installation. It kept stumbling on error; it seems corrupted though I check the disk for erros/bad sectors and did not ...
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0answers
29 views

Getting Dual-boot to work on (non?) UEFI system.

This is the first time I'm working on a Laptop with UEFI so bear with me. I'm gonna bullet-point this to make it quick: HP Envy 6 Windows 7 Preinstalled Default BIOS setting: Legacy Support - ...
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45 views

Cannot boot onto any OS after deleting Linux partition on UEFI system

Today, I decided to delete Ubuntu 14.10 from my computer. Everything was OK, I had created the USB recovery drive of Windows 8.1. After formating the Linux, I restarted. Sadly, I forgot to delete the ...
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1answer
91 views

Cannot access BIOS after installing a Linux distro

Some time ago, I went and installed ElementaryOS on my Samsung NP530U3C. After that, I could never access the BIOS again. Pressing F2 had absolutely no effect (neither any other common BIOS-accessing ...
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2answers
80 views

replace efi firmware with old legacy bios?

So I bought a new laptop with 64-bit windows 8 pre-installed, and in preparation for downgrading to win7 32-bit, i've been reading about EFI and MBR etc.. It seems like the firmware which boots disks ...
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0answers
77 views

Changed laptop BIOS boot settings - Black screen

Laptop concerned is an Acer TravelMate P453-M. Already asked the question on Acer forums, but maybe you guys can add more insight! I recently had a motherboard and HDD replacement on the laptop. I ...
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1answer
113 views

How do I convert an EFI System Partition into a normal GPT partition?

I had a Windows 8.1 that required a re-install. In the process, my 4TB secondary disk is now showing up in Disk Management as an EFI System Partition, with no volume. In DISKPART, a volume is shown, ...
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0answers
90 views

Go2Bios utility not proper working when trying to acces into bios

i have this motherboard, msi h97 gaming 3, now msi have go2bios an utility which gives the access to bios during a windows session. In a fairy way the system reboot into the bios, but when i click on ...
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5answers
593 views

Secondary Internal HDD Vanishes/Reappears Randomly In Windows 8.1

To clarify, I'm referring to entire disks disappearing, not just partitions. The PC in question is an HP Pavilion 2325DX. Both drives are variants of HGST. One is in the primary slot, the other is in ...
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2answers
239 views

Asus A53E Laptop in UEFI mode resets BIOS three times before booting

Working with an Asus A53E laptop. Enabled UEFI boot mode in the BIOS and installed Windows 8.1 x64 successfully last night. Now, today, when I start up the machine from cold boot, I can clearly hear ...
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0answers
273 views

How can I place /boot/efi on a different drive than / and /home?

I am trying to install Fedora 21 onto a relatively recent Toshiba laptop. Due to firmware problems, I cannot alter the existing EFI partition. Therefore, I need to install /boot/efi on external media. ...
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0answers
52 views

Windows 8.1 - doesn't allow me to boot into firmware settings

I have Windows 8.1 which is booted for sure in UEFI mode because of some reasons I'm booting with UEFI Gop and my inital windows resolutions is Full HD. This image: My BCD configuration: ...
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0answers
79 views

Restore hardware entries in UEFI from Windows 8.1

After a missuse of efibootmgr under Centos 7, I have deleted every boot entries in UEFI, including USB, CD-ROM, DVD. So I couldn't boot anything. I recovered Windows with the recoverer partition, but ...
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1answer
162 views

How to add UEFI image boot option in BCDedit?

I just installed FreeBSD on a GPT partition. On which is also installed Windows 8.1 and it's EFI partition with Windows Boot Manager. The FreeBSD installer auto-added another EFI partition with it's ...
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0answers
264 views

Multiboot by UEFI boot manager for Win8.1, Mac OS X and Linux

I am trying to build a hackintosh and want to multi-boot 1) Windows 8 2) Mac OS X and 3) Linux. Each OS will be installed on their own harddisk. If the motherboard and display card are fully ...
0
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1answer
67 views

What is CSM option

What is the CSM option in BIOS? If I can't boot into Windows any more, is it because CSM is disabled? Would an ASUS K55 come with this option diabled?
2
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1answer
419 views

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 ...
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0answers
322 views

USB HDD disk not recognized in BIOS Boot order

I installed Ubuntu 14.10 along with Windows 8.1. Obviously I used a USB drive to install Ubuntu. I made all changes to UEFI so I could boot from USB. I could see the USB in the Boot Menu and was able ...