Windows 10: Windows won't boot in UEFI mode, deleted EFI partition. Solved

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  1.    25 Aug 2015 #21

    Rudy Mas said: View Post
    Haven't done this in a while, but can't you just disable the second HDD through the BIOS? Normally, it is set to auto detect, I think. Switching this to Disabled should do the trick. But as I said, haven't done this in a long time.
    Kyhi said: View Post
    Here lies another issue > stop using RUFUS
    MS does not use RUFUS..

    MS setup media will boot Legacy and UEFI depending on the PC's Firmware settings
    Most Newer PC's boot UEFI by default

    The issue comes from having legacy support enabled in the Firmware and you selecting the WRONG USB boot Mode from the Boot menu
    Hmm, unfortunately it seems like that could be the case. I had a look in the BIOS for the ability to disable a hard drive or SATA port, but unfortunately nothing was listed. However, i did come across one interesting option and i think it could be of use in this situation:

    "Launch EFI shell from filesystem device. Attempts to launch EFI shell application (Shellx64.efi) from one of the available filesystem devices."

    I'm curious as to whether this means anything and has potential to help with my issue. What do you think?
      My ComputerSystem Spec

  2.    25 Aug 2015 #22

    Kyhi said: View Post
    Here lies another issue > stop using RUFUS
    MS does not use RUFUS..

    MS setup media will boot Legacy and UEFI depending on the PC's Firmware settings
    Most Newer PC's boot UEFI by default

    The issue comes from having legacy support enabled in the Firmware and you selecting the WRONG USB boot Mode from the Boot menu
    I use RUFUS, because the system I use for creating my bootable media doesn't have UEFI support. So, MS setup media can't detect UEFI when creating the media. That's why I couldn't boot it with my HP ProBook which was set to boot with UEFI.

    RUFUS was the only option for me, and I advice to use this to others, because it gives them more control over how to create their media.


    Sometimes, you don't have access to a crashed system, and you have to prepare the bootable media on an other system.

    BTW, tried all the options I had access to on my first bootable media, but none of them worked. When I created my media with RUFUS, an extra option popped up in the boot menu, which made it possible to boot with my USB stick.
      My ComputerSystem Spec

  3.    25 Aug 2015 #23

    OnePlus said: View Post
    Hmm, unfortunately it seems like that could be the case. I had a look in the BIOS for the ability to disable a hard drive or SATA port, but unfortunately nothing was listed. However, i did come across one interesting option and i think it could be of use in this situation:

    "Launch EFI shell from filesystem device. Attempts to launch EFI shell application (Shellx64.efi) from one of the available filesystem devices."

    I'm curious as to whether this means anything and has potential to help with my issue. What do you think?
    This could work. I don't have that option in my UEFI, so I can't be sure. I know I tried to boot with an EFI file, through the Boot menu, but that didn't work on my system.
      My ComputerSystem Spec


  4. Posts : 1,841
    Windows 3.1 to Windows 10
       25 Aug 2015 #24

    that shell is BOOTMGR.efi
      My ComputerSystem Spec

  5.    25 Aug 2015 #25

    I am also using uefi native mode in my hp probook 450 g2 notebook pc
      My ComputerSystem Spec

  6.    25 Aug 2015 #26

    Rudy Mas said: View Post
    It will, trust me.

    As I understood, your system came with Windows 10 installed, so it probably had an EFI partition on it. This was used by your USB stick when it booted. Now that it is gone, the USB stick can't find the information anymore it needs to boot. That's why you have to create the USB stick in a way that all the necessary information is on it, so it doesn't need anything from other sources.
    Excellent news, it worked fine once i did this! There was quite a delay because i had to wait for the Windows image to download, but once i attempted booting the USB with the drive set up in Rufus strictly for UEFI systems only, it worked fine.

    Thanks for suggesting the fix and i must apologise for not believing this would work at first, haha. Cheers to everyone else who had responded in an effort to help out, it is much appreciated.
      My ComputerSystem Spec

  7.    25 Aug 2015 #27

    OnePlus said: View Post
    Excellent news, it worked fine once i did this! There was quite a delay because i had to wait for the Windows image to download, but once i attempted booting the USB with the drive set up in Rufus strictly for UEFI systems only, it worked fine.

    Thanks for suggesting the fix and i must apologise for not believing this would work at first, haha. Cheers to everyone else who had responded in an effort to help out, it is much appreciated.
    No problem. As you have guessed, I'm a very patient person.

    And I'm glad it worked for you. Now have fun with Windows 10. I know I'm having a lot of fun with it!
      My ComputerSystem Spec

  8.    25 Aug 2015 #28

    Rudy Mas said: View Post
    No problem. As you have guessed, I'm a very patient person.

    And I'm glad it worked for you. Now have fun with Windows 10. I know I'm having a lot of fun with it!
    Credit goes to me too . I always emphasize the use of rufus.. actually you also have the option of "customized boot" in the bios too in case hp brand who hard core define the unique path of boot manager but you can define by yourself in case you wanna use linux and set the path and adjust the boot device order...so all is good for now
      My ComputerSystem Spec


 
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