Windows 10: Change boot back from efi to mbr

Discus and support Change boot back from efi to mbr in Windows 10 Support to solve the problem; A quick explenation to my problem, so I formated a drive with an old windows installation on it (not the one qurently in use) and it hade my boot... Discussion in 'Windows 10 Support' started by tobbeth, Jan 30, 2020.

  1. tobbeth Win User

    Change boot back from efi to mbr


    A quick explenation to my problem, so I formated a drive with an old windows installation on it (not the one qurently in use) and it hade my boot records on it, so I got the error bootmgr missing. So a bit panicked I used the first solution witch was "bcdboot c:\windows /s h:" from the command prompt from a USB with a windows ISO on it. That fixed it and I could now boot in to windows and everyting worked.

    But this made it so i'm booting with EFI insted of MBR. So i'm booting with a boot option on my H: drive witch is not my windows instalation drive witch is C:. The C: drive is MBR and the H: drive is GPT. Is there a way to fix it so that I can choose my C: drive in the bios to boot from. So remove the efi and use mbr instead.

    :)
     
    tobbeth, Jan 30, 2020
    #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, Jan 30, 2020
    #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

    Change boot back from efi to mbr [​IMG]
     
    topgundcp, Jan 30, 2020
    #3
  4. Change boot back from efi to mbr

    Converting MBR to GPT for EFI boot?


    Your method did not work for me when converting my current Windows 8 MBR disk, however I did come out knowing how to create Windows PE 5.0 Rescue disk using Macrium after reading your post though.
     
    urbanman2004, Jan 30, 2020
    #4
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Change boot back from efi to mbr

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