Windows 8 and 8.1 Forums


can't turn on secure-boot on after 8.1 reinstall

  1. #1


    Posts : 15
    win 8

    can't turn on secure-boot on after 8.1 reinstall


    I recently fresh-reinstalled win8.1 (through .iso provided by MS)
    I had turned off the secure boot and turned on the legacy boot, while installing 8.1. (so as to be able to boot from CD drive)
    now, I am unable to change it back.
    if I do (that is, turn on uefi secure boot), the message returns saying this:
    internal hard disk drive not found to resolve this issue, try to reseat the drive
    no bootable device strike f1 to retry boot, f2 enter setup, f5 enter psa.
    so, I had to return to legacy boot with secure boot off.
    it seems... because of this, the start up is taking quite long.
    any suggestions? guidance?
    regards
    biren

      My System SpecsSystem Spec

  2. #2


    Posts : 2,690
    Windows 3.1 > Windows 10


    That is because your reinstallation was installed in BIOS (legacy) mode.. You should of booted into UEFI and secure boot..
      My System SpecsSystem Spec

  3. #3


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit


    yes i remember doing something like that too.. I think i finally got mine to install in Secure boot mode.. I never had to turn it off..

    but i also remember a huge ordeal trying to get my secure boot back on.. i had to go into my bios and keep resetting "hardware defaults" and reset all the time in some specific order to finally get my secure boot to say "on" ..

    hopefully you dont have to go through that..

    Merry Christmas
      My System SpecsSystem Spec

  4. #4


    No need to restore default UEFI configuration.


    Turn Legacy Mode/BIOS OpRom Emulation OFF
    Just having it on will slow down your boot time drastically.

    Enable secure boot.

    Insert DVD or make a USB Flash Drive Installer, and don't let it boot, instead open your boot menu and select [UEFI: CD-ROM Windows blah blah] instead of [CD-ROM: Windows blah blah].

    format disk with GPT (GUID Partition Table)
      My System SpecsSystem Spec

  5. #5


    Posts : 15
    win 8


    dear hydranix,

    i have changed (after i wrote this post) the boot to "legacy mode" from previous "uefi secure boot off". the start up time has reduced quite a bit.

    so now, one, should i keep using legacy mode or is it better to have 'uefi-secure boot on' booting?
    two... in what you have suggested, are you asking me to reinstall windows? and if so, is there no other way to turn on secure boot on?

    three... i am sorry to sound like a dirk... but i am feeling like one so... could you tell me what i need to do - stepwise?
    i would be grateful.

    thank you.
    biren
      My System SpecsSystem Spec

  6. #6


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit


    - If i remember correctly, You do have to install windows with all settings set correct.. so yes probably you have to reinstall windows.. i will have to google and search around if there is some way to switch it on without re-installing windows but i kind of remember I had to reinstall..

    i personally would take advantage of the technology that is allowed by your bios/motherboard/manufacture/microsoft and use it.. so get off legacy boot etc..

    now, will you really see a difference in using your computer? definitely not.. so you would be just fine with legacy boot etc.. however, do you download illegal software and go to malicious websites (meaning questionable websites)?? if you do, go back and reinstall using secure boot and all the defense you can get..

    otherwise, why would you be worried if you aren't doing questionable things.. I personally do all kinds of tweaking and try out all different kinds of programs.. so i do turn it on and hope that it helps prevent me from destroying my computer..


    --taken straight from the technet Microsoft website.. (posted below) READ..
    Secure Boot Overview

    76 out of 127 rated this helpful - Rate this topic
    Updated: May 5, 2014
    Applies To: Windows 8, Windows 8.1, Windows Server 2012, Windows Server 2012 R2
    Secure Boot is a security standard developed by members of the PC industry to help make sure that your PC boots using only software that is trusted by the PC manufacturer.

    When the PC starts, the firmware checks the signature of each piece of boot software, including firmware drivers (Option ROMs) and the operating system. If the signatures are good, the PC boots, and the firmware gives control to the operating system.


    **edit - Oh and ofcourse I do have secure boot on and you wouldn't believe how fast my boot time is.. so it does not affect boot time..


    --as far as steps to reinstall ?

    start here and use both..

    1.Secure Boot isn't configured correctly: troubleshooting

    2. Secure Boot - Enable or Disable in UEFI (eight forums ofcourse!)
      My System SpecsSystem Spec

  7. #7


    Quote Originally Posted by biren View Post
    dear hydranix,

    i have changed (after i wrote this post) the boot to "legacy mode" from previous "uefi secure boot off". the start up time has reduced quite a bit.

    so now, one, should i keep using legacy mode or is it better to have 'uefi-secure boot on' booting?
    two... in what you have suggested, are you asking me to reinstall windows? and if so, is there no other way to turn on secure boot on?

    three... i am sorry to sound like a dirk... but i am feeling like one so... could you tell me what i need to do - stepwise?
    i would be grateful.

    thank you.
    biren
    Biren,

    No, you don't have to reinstall Windows, however, it is far easier to reinstall, as not reinstalling will require a Linux live CD, a Windows install CD, command lines in Linux, command lines in Windows, and an acute understanding of the Windows boot loader/BCD.


    You actually don't need secure boot. It does provide a tiny amount of security, but it is security mostly against targetted attacks.

    You do however want to UEFI boot. It is incredibly faster than legacy.

    Legacy requires an MBR-style disk, UEFI requires a GPT style disk. You can easily convert the disk at install time, but you will need to format the whole thing.

    You must disable legacy mode, boot the install cd in UEFI mode (from the BIOS/UEFI boot menu), and procede to install after a disk format.

    Press Shift + F10 ojce you UEFI boot the installation CD.

    Enter the following, substitute '0' for the disk number of the target disk you want to install to. It will displayed after 'lis dis'.
    Code:
    C:\> diskpart
    DiskPart> lis dis
    DiskPart> sel dis 0
    DiskPart> cle
    DiskPart> conv dis
    DiskPart> exit
    C:\> exit
      My System SpecsSystem Spec

  8. #8


    Posts : 2,690
    Windows 3.1 > Windows 10


    Turn on UEFI and secure Boot - Reinstall windows..

    Legacy boot and UEFI Boot are two different boot methods and use two different partition structures..

    So it is one or the other.. period..

    And you can't convert one installation to the other..
      My System SpecsSystem Spec

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