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  1. Joined : Sep 2016
    Posts : 17
    Windows 10
       08 Sep 2016 #1

    UEFI Boot problem after bcedit command


    I 'm afraid that I've made a mess in the UEFI of my laptop, that can't be fixed. The history is the following:

    I had a dual boot setup, Windows 10 and Ubuntu, but I wasn't using the linux for a long time. Now I will need to use it again, so I decided to remove the old one (version 14) and install the most recent version.

    I followed the steps in this tutorial: How To Remove Ubuntu From A Computer Dual Booting With Windows 10 (UEFI only) Everyday Linux User

    In short:
    sudo efibootmgr
    sudo efibootmgr -0 1, to make windows the default boot (I guess it is here that the mess starts, beacuse I put only windows in the boot list)
    Then I deleted the ubnutu from EFI partition.

    So far no problems. I was able to remove Ubuntu from booting, and was able to boot into Windows 10.
    But when I tried to boot trough a DVD to install the new Ubuntu version, nothing happened. In the boot order menu in the UEFI there was only one one option, Windows Boot Manager, and no other driver (DVD, HD, USB, etc.). There's also no option to add new drives from the UEFI menus.

    Searching in the internet for how to enable to boot from DVD again I haven't found no solution that resolved my problem.
    Then comes the big mess. After a couple of hours without no results, I found a post where it was used the following command in Windows prompt:

    bcdedit /set {bootmgr} path \EFI\refind\refind_x64.efi

    I don't know why, but I just executed the command without further reading.

    Now I simply can't boot. It says all boot options are tried, but none succeeded.
    I tried to use the laptop's recovery, to restore it to factory conditions, but it had no effect on this issue.

    Anyone can help me? Does it have a way to solve or I simply "killed" the laptop?
    And if I can make the computer bootable again, how do I add new boot options to the UEFI?

    Thanks in advance and sorry for any english mistakes.
      My System SpecsSystem Spec


  2. Joined : Aug 2016
    Posts : 25
    Windows 10
       08 Sep 2016 #2

    Uzai said: View Post
    But when I tried to boot trough a DVD to install the new Ubuntu version, nothing happened. In the boot order menu in the UEFI there was only one option, Windows Boot Manager, and no other driver (DVD, HD, USB, etc.). There's also no option to add new drives from the UEFI menus.
    You do not need to change the boot order of drives in your UEFI firmware settings, so use the default settings.

    Use the one-time boot menu to boot from USB/DVD.

    Boot to UEFI Mode or Legacy BIOS mode

    Boot to UEFI Mode or Legacy BIOS mode

    Select the firmware mode during bootup

    1. Boot the PC. As the firmware starts to run, press the key that opens the boot device menu. For example, press the Esc, F2, F8, F9, F12, or other key to enter the firmware or boot menus.

    2. On the boot device menu, select the command that identifies both the firmware mode and the device.

    Note

    You might see separate commands for the same device. For example, you might see UEFI USB Drive and BIOS USB Drive. Each command uses the same device and media, but boots the PC in a different firmware mode.
    Booting to the Boot Menu and BIOS

    Samsung Ativ Book - Boot Menu Key: F2 (Must disable "Fast Boot" in BIOS)
      My System SpecsSystem Spec


  3. Joined : Sep 2016
    Posts : 17
    Windows 10
       08 Sep 2016 #3

    I can enter BIOS/boot menu via F2, but it seems to have no options that I can change to do what is suggested above.

    In Advanced menu I have:
    EDB (Execute Disable Bit) [Enabled/Disabled] - Current Enabled
    Fast BIOS Mode [Enabled/Disabled] - Current Disabled
    AHCI Mode Control [Auto/Mnual] - Current Auto
    USB S3 Wake-up [Enabled/Disabled] - Current Enabled

    In Boot Device Priority there is only Windows Boot Manager to select.

    In Boot:

    Secure Boot [Enabled/Disabled] - Current Disbled
    OS Mode Selection [UEFI / CSM OS / UEFI and CSM OS] - Current UEFI and CSM OS
    Internal LAN [Enabled/Disabled] - Current Enabled
    PXE OPROM [Disabled/Legacy Only/UEFI Only] - Current Legacy Only

    No set of options seems to make the system boot.
      My System SpecsSystem Spec


  4. Joined : Jun 2016
    Posts : 1,385
    Win10 1607
       08 Sep 2016 #4

    on most PC's you can use F8 to boot to the Windows Boot Menu is what he meant I think . he was just pointing out that 1st you need to disable Fast Boot Mode in the Bios.....it is i can see in your list , so F8 should work.

    If you are deleting Linux , doing a Startup Repair with your Win10 Disk , should fix the corrrupt BCD

    if not do a manual fix ,from the admin command prompt

    Bootrec /rebuildbcd
    Bootrec /fixmbr
    Bootrec /fixboot

    see more info here about the above commands so you know what you are doing 1st...................

    https://support.microsoft.com/en-ca/kb/927392

    KB
      My System SpecsSystem Spec


  5. Joined : Sep 2016
    Posts : 17
    Windows 10
       08 Sep 2016 #5

    I guess I wasn't clear.

    I had Ubuntu + W10.
    I removed Ubuntu, was able to boot into W10.
    No DVD/USB boot option in bios.
    I used the bcdedit in W10 command prompt.
    W10 stopped booting. Still no DVD/USB option in bios.
    I used my laptop's recovery. OS drive was formated and W8.1 (default OS) was installed.
    Current situation: W8.1 cant boot, bios options stills the same.
      My System SpecsSystem Spec


  6. Joined : Jun 2016
    Posts : 1,385
    Win10 1607
       08 Sep 2016 #6

    try turning Secureboot back on
      My System SpecsSystem Spec


  7. Joined : Sep 2016
    Posts : 17
    Windows 10
       08 Sep 2016 #7

    Kbird said: View Post
    try turning Secureboot back on
    Ok. After turning Secureboot on the system booted in the W8.1 (first initialization). After setting up an user I restarted the system and the problem came back. Can't make it work again.
      My System SpecsSystem Spec


  8. Joined : Jun 2016
    Posts : 1,385
    Win10 1607
       08 Sep 2016 #8

    Uzai said: View Post
    Ok. After turning Secureboot on the system booted in the W8.1 (first initialization). After setting up an user I restarted the system and the problem came back. Can't make it work again.

    you need to be a little more informative.... "Can't make it work again" doesn't help someone 1/2 a world away.....

    No boot ? no Win8 ? what error messages? etc.....

    personally I never had Win8 so maybe not able to help , but if I was You I would just Clean Install Win10 from the USB and get it over With....
      My System SpecsSystem Spec


  9. Joined : Sep 2016
    Posts : 17
    Windows 10
       09 Sep 2016 #9

    Kbird said: View Post
    you need to be a little more informative.... "Can't make it work again" doesn't help someone 1/2 a world away.....

    No boot ? no Win8 ? what error messages? etc.....

    personally I never had Win8 so maybe not able to help , but if I was You I would just Clean Install Win10 from the USB and get it over With....
    Sorry about lack of information.

    After being able to log in Windows 8.1 (after turning Secureboot on) I restarted the computer. After that, same error message as before: "All boot options are tried. Press <F4> key to recover with factory image using Recovery or any other key for next boot loop iteration." (Secureboot on or off gives the same error). I used Recovery (again), but nothing changed.

    But the major problem is: I CANT do any clean install. There are no boot options in the BIOS, only Windows Boot manager. No pen drive or DVD can BOOT the system (I have tried, Ubuntu and Windows 10).
      My System SpecsSystem Spec


  10. Joined : Jun 2016
    Posts : 1,385
    Win10 1607
       09 Sep 2016 #10

    Secureboot and Fast Boot on a laptop would need to be off I think to boot USB

    You may also need to Format the USB Fat32 and Then mount the Win10 ISO in File Explorer (RC>Open with>File Explorer) and Copy the Win 10 Files from what looks like a DVD to the USB Drive. YOu can right click again and choose Eject to unmount the ISO again.

    KB.
      My System SpecsSystem Spec


 
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