Windows 10: dual EFI entries after GPT conversion

Discus and support dual EFI entries after GPT conversion in Windows 10 Gaming to solve the problem; For reasons too lengthy to detail here, I was unable to use MBR2GPT for converting my current boot disk. Instead, I used Hasleo Disk Clone to clone the... Discussion in 'Windows 10 Gaming' started by Chuck_Lane, Feb 17, 2023.

  1. dual EFI entries after GPT conversion


    For reasons too lengthy to detail here, I was unable to use MBR2GPT for converting my current boot disk. Instead, I used Hasleo Disk Clone to clone the disk to another SSD while also converting it to GPT. This worked fine and the new drive correctly shows up as GPT with the shiny new MSR and EFI partitions. However, it left the protected/system EFI directory intact on the drive. My UEFI has been set to UEFI only with CSM=Disabled and yet I can still see entries for both EFI instances. Booting to the GPT partition works fine, but booting to the EFI directory fails. Is it possible and safe to

    :)
     
    Chuck_Lane, Feb 17, 2023
    #1
  2. Word Man Win User

    Converting MBR to GPT for EFI boot?


    What you say is true enough. However, creating the EFI partition is covered in his step number 3.
     
    Word Man, Feb 17, 2023
    #2
  3. topgundcp Win User
    Converting MBR to GPT for EFI boot?


    @Mystere
    Sorry but did you read the steps I posted ?. What do you mean by: It may boot up, but won't be EFI ? How else does it boot up with a GPT disk ? Here's the screen shot

    dual EFI entries after GPT conversion 50960d1485960182t-converting-mbr-gpt-efi-boot-.jpg
     
    topgundcp, Feb 17, 2023
    #3
  4. neilpzz Win User

    dual EFI entries after GPT conversion

    MBR to GPT Conversion

    This is the Microsoft instructions for conversion MBR2GPT - Windows Deployment | Microsoft Docs you need to understand the process before you start.

    I presume you mean enable TPM and it may be that part of secure boot requires the bios to be in UEFI mode and not legacy, before you can change the TPM setting.

    Sounds like your system is set in legacy mode and using MBR. To use UEFI the boot disk has to be set to GPT.

    Sorry forgot the last bit. The conversion keeps all data in tact.
     
    neilpzz, Feb 17, 2023
    #4
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dual EFI entries after GPT conversion

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