UEFI + Secure Boot not logging into W10 (dual-boot)

  1. doriandiaconu's Avatar
    Posts : 203
    Windows 10 Insider Build 17035 / Ubuntu 17.10
       14 Dec 2016 #1

    UEFI + Secure Boot not logging into W10 (dual-boot)


    So I'm the guy who tried to move from Legacy to UEFI some days ago. I managed to move both Ubuntu and W10 to UEFI.

    More info on both of the situations here:

    Solved Can't boot into UEFI mode - Lenovo Z50-70 - Windows 10 Forums

    Queston about GRUB2 + UEFI - Ask Ubuntu

    It seems that when I enable Secure Boot I keep getting these errors (It works if Secure Boot is not enabled, also Ubuntu boots just fine):
    Attached Thumbnails Attached Thumbnails DSC_0004.jpg   DSC_0003.jpg   DSC_0002.jpg  
      My ComputerSystem Spec

  2. doriandiaconu's Avatar
    Posts : 203
    Windows 10 Insider Build 17035 / Ubuntu 17.10
    Thread Starter
       14 Dec 2016 #2

    Tried to do a startup repair:

    Logs: http://pastebin.com/2BjC1x5j
    Attached Thumbnails Attached Thumbnails DSC_0003.jpg  
      My ComputerSystem Spec

  3.    15 Dec 2016 #3

    You cannot run the Bootrec commands from the X:\Sources temporary drive. These commands need to be run from the Drive letter the OS is on. Remember, in the RE(Recovery Environment) the OS drive may not be C:

    At command prompt (x: sources) type this exactly as written:
    bcdedit |find “osdevice” (Must inc and the |), the | before Find is the Upper case \ key) press enter. This will tell you what drive letter the OS is on.It may not be on the C: drive.
    Now use the returned as the drive letter for OS, for this example, assume C: or whatever drive letter is the os device.
    Or, you can type C: and press enter, then type DIR and press enter. If there is a Windows directory under that drive letter, then that is the OS device. Or D: etc Type that drive letter once you know, followed by the Bootrec command.

      My ComputerSystem Spec


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