Windows 10: Unable to Convert Windows 10 LTSB Build 14393 from MBR to GPT

  1.    12 Mar 2018 #1

    Unable to Convert Windows 10 LTSB Build 14393 from MBR to GPT


    Hello,

    I am having some issues trying to convert a disk from MBRto GPT by using the following command in Admin Powershell “mbr2gpt.exe /convert/AllowfullOS”. My company has introduced a new image called Windows LTSB Build14393 that we are wanting to use as our “base image”, since this particularbuild strips away all the “Extra” stuff such as edge, Microsoft store, etc etc.
    Anyways, the problem I am running into is the followingcommand:
    “mbr2gpt.exe /convert /AllowfullOS”
    It states that the following file isn’t specified. Afterdoing some research online, I found a post on Microsoft’s website that statesthe following command is only compatible in builds 1703 or higher. The reasonbehind us needing to convert the disk from MBR to GPT is so UEFI can be turnedon while the drive is encrypted with bitlocker. Otherwise every time you rebootor make a simple change in the BIOS, bitlocker is going to prompt for therecovery key…
    Is there some type of third party tool that can be used toconvert a disk to GPT? Or perhaps some type of “Work Around”?
    Any help at this point would be greatly appreciated!
      My ComputerSystem Spec

  2.    12 Mar 2018 #2

    You can do this with Macrium Reflect, but I'm not sure it will be what you're looking for. Check out this Macrium article "Convert an MBR disk to a GPT disk," and see if it might work for your needs.
    HTH,
    --Ed--
      My ComputersSystem Spec


  3. Posts : 11,807
    Windows 10 (Pro and Insider Pro)
       12 Mar 2018 #3

    Ed's suggestion is probably the best, since you get (and probably have) system image.

    Other solution is to use Minitool partition wizard, but Pro version is required for converting system disk. Did you consider using WinPE environment? Not sure about possible bitlocker problems using newer Windows environemet.
    Check this Minitool page
      My ComputerSystem Spec

  4.    12 Mar 2018 #4

    AndreTen said: View Post
    Ed's suggestion is probably the best, since you get (and probably have) system image.

    Other solution is to use Minitool partition wizard, but Pro version is required for converting system disk. Did you consider using WinPE environment? Not sure about possible bitlocker problems using newer Windows environemet.
    Check this Minitool page
    AndreTen,

    Yes, I moved the mbr2gpt installer to a WinPE environment and tried to run the installer that way... It said it completed successfully but still couldn't boot to the hard disk when UEFI was turned on. I'll try Ed's suggestion to see if that helps.
      My ComputerSystem Spec


  5. Posts : 4,475
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint
       12 Mar 2018 #5

    I see an issue may be that the LTSB is an Enterprise edition of Win10.
    Quoted from Windows 10 editions - Wikipedia

    Long-Term Servicing Branch (LTSB)This branch is exclusively available for Windows 10 Enterprise LTSB edition and distributes snapshots of this edition that are updated every 2-3 years. LTSB builds adhere to Microsoft's traditional support policy which was in effect before Windows 10: They are not updated with new features, and are supported with critical updates for 10 years after their release. Microsoft officially discourages the use of LTSB outside of "special-purpose devices" that perform a fixed function and thus do not require new user experience features. As a result, it excludes Windows Store, most Cortana functionality, and most bundled apps (including Microsoft Edge).[6][1][3] According to a Microsoft announcement, this branch will be renamed Long-Term Servicing Channel (LTSC) in 2019, to match the name changes mentioned above.
    The Build number 14393 suggests the Version is 1607, we now have Versions 1703 and 1709 with 1809 probably later this year. Version numbering is Year and Month of release.
      My ComputerSystem Spec

  6.    12 Mar 2018 #6

    The Macrium page to which I linked in my earlier post also provides instructions. One way or another, we'll help you get it sorted!
    --Ed--
      My ComputersSystem Spec

  7.    12 Mar 2018 #7

    manofskill said: View Post
    The reasonbehind us needing to convert the disk from MBR to GPT is so UEFI can be turnedon while the drive is encrypted with bitlocker. Otherwise every time you rebootor make a simple change in the BIOS, bitlocker is going to prompt for therecovery key…
    You'll get no advantage from doing this.

    If you change BIOS setting you will be prompted for a recovery key exactly the same if you are booting in UEFI or legacy mode (I run bitlocker on both types of system). This is the point of bitlocker - to stop unauthorized changes to the boot process and it works exactly the same with legacy and UEFI.

    If you want to make a change to a BIOS setting then the correct procedure is to suspend bitlocker, reboot, make your change and then once you get back to desktop bitlocker is re-enabled.

    Suspend or Resume BitLocker Protection for Drive in Windows 10 Windows 10 Tutorials
      My ComputerSystem Spec


 

Related Threads
Source: https://support.microsoft.com/en-us/help/4074596 Direct download links for KB4074596 from Microsoft Update Catalog: :arrow: Download KB4074596 MSU for Windows 10 LTSB Version 1507 32-bit (x86) - 460.4 MB :arrow: Download KB4074596...
Source: https://support.microsoft.com/en-us/help/4075199/windows-10-update-kb4075199 Find Windows 10 Version Number Find Windows 10 Build Number Direct download links for KB4075199 from Microsoft Update Catalog:
Greetings, I am running Windows 10 Enterprise, Version 1703, OS Build 15063.483 and I'm having trouble converting my MS connected account to a local one, since the button to do so simply isn't there. Imgur: The most awesome images on the Internet...
Update May 9th 2017: This was replaced by: Cumulative Update KB4019472 Windows 10 v1607 Build 14393.1198 - - Windows 10 Forums Windows 10 PC Version 1607 Build 14393.1066 Windows 10 Mobile build Build 14393.1083
Source: Windows 10 update history - Microsoft Cumulative update for Windows 10 Version 1607: September 20, 2016 Windows Update - Check for and Install in Windows 10 - Windows 10 Forums
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