Convert MBR to GPT with MBR2GPT


  1. Posts : 130
    Microsoft Windows 10 Home 64-bit
       #1

    Convert MBR to GPT with MBR2GPT


    In order to be compatibe with Windows 11(?) I must change following settings:
    Boot type: UEFI
    Disk partiton: GPT instead of MBR
    TPM Version: enabled in UEFI

    the tool MBR2GPT (already on the system as part of the Windows 10 Creators Update) does just that.
    my disk meets the conversion requirements (MBR2GPT validate)

    My question is: if I do the actual conversion from MBR to GPT will I loose data or OS?

    thanks in advance fot any answer.
    gabriėl
      My Computer


  2. Posts : 526
    Windows 10
       #2

    No. But create a backup image before converting. Just in case.
      My Computer


  3. Posts : 43,007
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #3

    Hi, your question is answered in the relevant tutorial:
    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

    see also
    Convert MBR Disk to GPT Disk in Windows 10

    Win 11 is currently an Insider build. It won't be released formally perhaps until early next year.

    You may like to try running Win 11 in a virtual machine first to see what you think of it.

    Its installer imposes many other constraints from CPU types supported to requiring DirectX12, and TPM2.
    However it installs readily in a virtual machine, and these requirements are relaxed for builds acquired from the Dev channel. Other workarounds have been found.
      My Computers


  4. Posts : 130
    Microsoft Windows 10 Home 64-bit
    Thread Starter
       #4

    thanks for the answers.
    much appreciated
      My Computer


  5. Posts : 23,281
    Win 10 Home ♦♦♦19045.4355 (x64) [22H2]
       #5

    aliskander said:
    thanks for the answers.
    much appreciated


    If it helps... I just did convert MBR 2 GPT on my Windows drive. It took about 5 seconds and zero data loss.
    And I didn't even have an EFI System partition.

    Just ran: mbr2gpt /convert /allowfullOS from an elevated command prompt.
    It created the EFI System partition, moved the System files from my C: drive to the EFI partition, and converted.



    Before...

    Convert MBR to GPT with MBR2GPT-000000-ssd-setup.png



    After...

    Convert MBR to GPT with MBR2GPT-000000-mbr-gpt.png
      My Computer


  6. Posts : 130
    Microsoft Windows 10 Home 64-bit
    Thread Starter
       #6

    thank you very much.
      My Computer


 

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