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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Uefi partition and resizing C drive and D drive

I recently found how to boot from uefi in windows without reinstalling it.I created the partition needed and converted from mbr to gpt.But now I need more space on C: drive and uefi partition is the ...
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9 views

Find out by which certificate a kernel module is signed

I have a machine running Ubuntu 16.04 with UEFI and SecureBoot enabled. dmesg shows me that some certificates are loaded in order to verify kernel module signatures: midas@Mothership:~$ dmesg | ...
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SSD not detected in ASUS X550LN BIOS

I recently bought a SSD drive (Transcend SSD370S) to upgrade my laptop (ASUS X550LN). As the laptop does not have space for an additional drive, I had to replace my hard disk. After booting from a ...
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2answers
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How to disable secure boot if I don't have Windows installed?

I can't install Windows on my laptop until I can go to BIOS and select appropriate SATA/AHCI (if I don't do this, an error fires during Win file expansion on my Dell XPS 9333). I have managed to ...
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1answer
45 views

Installing Ubuntu with secure boot on and no way to disable it?

I don't have any OS installed. I wanted to install Win10 but it failed with error code 0x80070570 during install. Now, I want to go back to Ubuntu but I am not able to (Only Unetbootin screen shows ...
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1answer
13 views

ASUS M11ad - How to boot to USB?

The subject computer is setup to dual boot Win 8.1 and Ubuntu 14.04 with no problems. I'm trying to prep for an upgrade to Ubuntu 16.04 but I can't get it to boot off USB! I remember struggling with ...
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18 views

(UEFI) Not booting from USB and bootloader overwritten

Okay, I'm really out on a limb here... I was creating a UEFI bootable USB thumb drive for reinstalling Debian Jessie. I was really careful during the process not to touch my main drive at all. ...
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1answer
43 views

What is written in the EFI partition ? In details

I have a HDD(called HDD1) with some partitions such as EFI partition and windows 10 partition. I have another HDD (called HDD2) with only a EFI partition and windows 10 partition. I would like to ...
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9 views

Lenovo G580 Zorin OS killed my bios. I can no longer access the bios or boot menu

I am struggling with a very serious problem with my old laptop. I installed Zorin OS to my laptop and now Every time I try to access the bios or the boot menu It says please wait after pressing the ...
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1answer
116 views

Linux Mint 18, Windows 10, UEFI, dual boot, where to install GRUB?

I have a Dell XPS with pre installed Windows 10 and UEFI. I need to install Linux Mint 18 near Windows 10 (I don't want to remove Windows, I need to keep it). I've already disabled Secure Boot and ...
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23 views

What is a reliable method to create a 64-bit WIN7 pro installer (DVD or USB) that boots on (U)EFI systems?

I am failing to start the Win7 pro installer in (U)EFI mode. I know that there are many instructions out there but can someone please point me to a really working solution. Goal: Burn DVD or write ...
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21 views

Windows 7 pro (64bit). Puzzled about (U)EFI install on Lenovo Thinkstation E31

after many years of absence to the MS Win world, I am trying to install a 64-bit Win7 pro in EFI mode onto my Lenovo Thinkstation E31 PC. When I set the firmware to solely work in UEFI mode, I am not ...
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1answer
36 views

Can't find option to activate legacy boot mode on Asus EFI BIOS

I installed Windows 10 on a PC but it has some incompatibilities with the graphic card. Now I want to install Windows 7, so I burned the ISO on an USB stick, and then I tried to boot the system with ...
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1answer
17 views

UEFI boot options doesn't appear in efibootmgr

Hello everyone, I'm new here treat me well ;) I want to change the boot order with efibootmgr but in the boot order appears options that I can't select. # efibootmgr Timeout: 2 seconds BootOrder:...
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9 views

Fedora UEFI Bootable USB not working

I installed Fedora 24 in BIOS earlier because I created Bootable media using YUMI on windows on a friend's system. Then now I am trying to create Bootable USB for Fedora in UEFI mode. I tried sudo ...
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1answer
27 views

Deleted Linux partitions on dual-boot computer but GRUB screen appears

I had Linux installation alongside Windows 10 on my dual booted laptop. I wanted to remove the Linux partition so I followed guides online so I deleted the 3 partitions associated with my Linux Mint ...
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2answers
28 views

Something resets BIOS time to a prior date

I have a batch of HP Prodesk 400 G2 computers with UEFI and Windows 10. From time to time, every day, the time and date reset to a fixed one, 2-3 weeks ago. I checked and reset the time from the UEFI. ...
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1answer
23 views

My screen says UEFI but windows says “Legacy” for BIOS - Which am I using?

I have a computer that right now is only configured to use Windows 10. It was originally installed running 8.1 and then upgraded to 10. I am trying to figure out if I am using BIOS or UEFI on this ...
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27 views

Dual boot legacy Windows and UEFI Fedora

I have a UEFI PC with two hard drives. On C: I have my main OS - Windows 10, which I have installed in legacy mode (or at least BIOS sees it as non-UEFI). On D: I installed Fedora 24 in UEFI mode (...
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44 views

Time difference on dual boot system (Windows 10 and 16.04)

I have a dual boot UEFI system with Windows 10 and Ubuntu installed. I have a problem related to the representation of RTC in the two system. Since I have read (on AU and some other sources around ...
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69 views

dual boot linux and win10 on laptop with SSD caching

I have HP Elitebook 840 G2 with 1TB HDD and 32GB SSD (separate M2 card) as cache I see it as RAID during boot process. Disk is MBR partitioned. I want to install Linux (Ubuntu) alongside Win10. ...
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1answer
21 views

Why the time displayed by OS is not the same with the time in UEFI?

I purchased a new notebook and installed several operating systems on it. I noticed that if I disabled time synchronization (or I was disconnected from Internet so time sync can't work), the time ...
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49 views

ACPI Bios error on Windows 10 Lenovo Tablet

I have recently purchased a Lenovo Miix 310-10ICR tablet that came with WIN 10 by default. I was tempted to try Android on it so I managed to download and install it yesterday. But, I made a HUGE ...
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1answer
31 views

Which part of the computer has to be replaced to add UEFI support?

I have recently acquired a computer that does not support booting into UEFI mode. However, I don't know which component of the computer to replace such UEFI booting is supported. From what I can tell, ...
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1answer
59 views

No valid bootloader target device found(For UEFI installation)

I have windows 10 and fedora 20 in my laptop(Dual boot). I wanna install fedora 24(by replace it on existing fedora),I made bootable usb disk from fedora 24 iso file with LiveUSB Creator, but during ...
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107 views

Could not locate '\efi\boot\bootx64.efi while installing windows 8.1 for dual-boot

I have a single-boot Ubuntu 14.04 installed on my system. Gparted shows the disk partitions like this: At the moment, I want to do a clean install of Windows 8.1 so that I can dual-boot later (with ...
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40 views

Is my Surface Pro 3 hard drive dead or can I fix it?

Last week my Surface Pro 3 froze. I had to shut it down by holding the power button. It rebooted but after a couple of minutes it froze again. It did this a few times before eventually only booting ...
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1answer
76 views

Failed command prompt in Slackware UEFI installation

I am trying to install Slackware current while booting in UEFI mode. I am using a USB to boot the installation. To create the USB I downloaded the .iso from alienbob's website and ran isohybrid --uefi ...
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1answer
20 views

SSD not mounting in UEFI secure boot off

I have a new Dell XPS15 which came with Windows 10 preinstalled. I completely wiped it and installed Slackware Linux. I can only run Linux in UEFI Secure Boot OFF Mode or Legacy Mode. When I start my ...
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41 views

Boot with wimboot a Windows x64 image on UEFI 32 bits

I have a Tablet PC that runs Windows x86 and Ubuntu x64 (mixed mode) on UEFI 32 bits with GRUB2 installed. I've tried to boot a Windows x64 WinPE image using wimboot program on GRUB2 becouse it ...
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3answers
49 views

Is it possible to remove hard drive without removing the cable?

Is it possible to remove a hard drive disk without removing the cable(s) (in my case, through UEFI) and without the operating system "trying" to display in "My PC" or something? If so, how can I do ...
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32 views

Cinnamon 17.3 Grub Failure on Re-Installation

How can I force Mint 17.3 Cinnamon to ignore a grub error to complete the installation? Or how can I fix the grub lock? I am attempting to reinstall Mint Cinnamon 17.3 on a Microsoft Surface 2 Pro ...
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49 views

How to boot tablet from usb

I need to boot my tablet from usb stick where my windows 10 install files are stored. There are no boot settings, I can access only UEFI shell see: That usb is blk0 and blk1 (when i unplug they ...
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29 views

Why can I boot from a USB device without “making it bootable”?

It seems like you can boot from a USB device without a bootloader to me. Even my 6 years old computers that still have a BIOS. From what I read the BIOS simply looks for an mbr, loads it and ...
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34 views

Dual Boot on fakeraid

I am having some issues with my MSI notebook: Currently there is Windows 10 installed in UEFI mode and the C: partition is Bitlocker encrypted. The Main disk is a RAID0 which is setup in the BIOS ...
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0answers
35 views

Unable to enter UEFI config menu at boot

I am unable to get into the UEFI firmware setting menu at boot time. Symptoms include: None of the F1/F2/.../F10 hotkeys bring out the UEFI config menu. Escape and Del only bring out a useless ...
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19 views

How to configure a MS Surface Pro to restart after AC power loss and restoration?

I have a MS Surface Pro that is being used as a kiosk. After an AC power failure and then restoration of power, I want the PC to turn itself back on. I have looked at the BIOS/UEFI of the device and ...
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25 views

Booting Xen guests with UEFI

Now that UEFI is gaining widespread adoption, is Xen able to boot guests using an emulated UEFI? If so, can secure boot be used for these guests?
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0answers
108 views

Installing Windows 7 via USB gives “CD/DVD drive device driver is missing” error

Apparently a lot of people have had this problem but I've tried all their solutions and came up with nothing. I'm trying to install Windows 7 64-bit SP1 via USB on an ADATA SP550 SSD with an ASUS ...
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3answers
103 views

Relationship between MBR / GPT / UEFI and their limitations

I have a situations where i have to decide to use MBR or GTP and UEFI. I've read too many articles on internet, but I'm confused about some things : I've read that MBR does not support drives with ...
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0answers
4 views

Recovery partition for identical OS

I have a recovery partition installed and would like the ability to choose which OS to use the recovery for. There are 2 copies of windows 10 installed and one copy is a duplicate of the other. I was ...
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0answers
10 views

Add windows to efi

I duplicated the windows 10 partition. I want to be able to choose which windows partition to boot into but the second windows copy wont boot. Is there anyway to add the second windows 10 to efi so i ...
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1answer
52 views

Disk boot option missing. Booting with UEFI mode and was working

I have an MSI Ghost Pro (GS60). I can't get it to boot from my SSD. "Hard Disk" and "USB Hard Disk" and others show in the boot options. With my BIOS, it shows more information about the disk and a ...
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1answer
34 views

Windows boot fails after plugging second HDD

There is an UEFI computer with SDD disk and Windows 8.1 installed on it. I'd like to add an HDD drive (non-empty, has some information, probably there was some old broken Windows on it too, but it was ...
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49 views

How to boot Windows 7 UEFI recovery partition?

I've got an image of a hard drive that won't boot from within a Qemu VM. I managed to get UEFI working using OVMF, but it still won't give me an option to boot the recovery partition. Given that I ...
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113 views

several minor issues intsalling Fedora 24 to an external USB drive

Most of my computers are UEFI, so I had the idea of, instead of dual-booting each one, installing Fedora 24 to a removable USB hard-drive, and having one Fedora installation that I could use on any ...
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44 views

How to GPT+UEFI boot on VirtualBox Linux guest

I managed installing my guest Linux in the VM. But I found the entry added by "efibootmgr" will not persist over reboot. Currently, this is what I am seeing: BootCurrent: 0002 BootOrder: 0000,0001,...
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0answers
54 views

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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0answers
52 views

How can I move Windows 10 bootloader (GUID) only to SD card?

I have been trying to upgrade my laptop from a AHCI SSD to a much faster NVMe SSD without much success. I've pretty much concluded that my six month old Dell XPS 13 9343 doesn't have BIOS support for ...
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1answer
39 views

Shrink total disk image: UEFI GPT Flashdrive - freespace at end

I have a disk image from a bootable flashdrive. It is GPT for EFI booting, so there is a small Vfat32 partition and three other Linux partitions, followed by about 3G of free space. I need to disk ...