Windows 10: Moving / recreating EFI partition

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  1. Posts : 2,014
    Windows 3.1 to Windows 10
       12 Apr 2018 #11

    Since you have still the original EFI partition
    You would just have to assign the drive letter S to that partition and then format that efi partition
    then run bcdboot

    Reading your post - you created another EFI partition
      My ComputerSystem Spec


  2. Posts : 1
    Windows 10 64bit
       2 Weeks Ago #12

    I know this thread is a little old, but I created an account and just wanted to say Thank You, Kyhi!

    Fixed me right up. For anyone wondering, I did this with Windows booted to the desktop, and it worked just fine. In my case, I had the EFI System Partition on the HDD instead of my SSD, which is apparently an issue when you install Windows 10 with both drives connected.

    Kyhi said: View Post
    - Boot the computer using the Windows 7/8/8.1/10 installation media.
    - On the first screen, press SHIFT+F10 to bring up the command prompt.
    - Run the following commands at the command prompt.

    diskpart
    list disk
    select disk # Note: Select the disk where you want to add the EFI System partition.
    list partition
    select partition # Note: Select the Windows OS partition (# number) or your data partition.
    shrink desired=100
    create partition efi size=100
    format quick fs=fat32
    assign letter=s

    list partition
    list volume Note: Note the volume letter where the Windows OS is installed.
    exit

    bcdboot X:\windows /s S:
    Note: Replace "X" with the volume letter of the Windows OS partition.

    BCDBoot copies the boot files from the Windows partition to the EFI System partition and creates the BCD store in the same partition.

    Remove the Windows installation media and restart the computer into your BIOS settings and set the SSD as the First Boot Device.
      My ComputerSystem Spec


 
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