1.    24 Jan 2017 #1
    Join Date : Aug 2015
    Posts : 5
    Windows 8.1

    Can I delete one EFI partition?


    Hi at all! I have used this procedure to move from Legacy BIOS to UEFI. Now msinfo32 shows UEFI, but I have two EFI partitions. See here:
    Click image for larger version. 

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    Can I delete the third partition, without making my system unbootable?

    Thanks in advance!
      My ComputerSystem Spec
  2.    24 Jan 2017 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,010
    Win 10 Pro (1703)

    Hi, I would have expected to see
    a. a Recovery partition - 450Mb. Without that, you have no Advanced Recovery options or automatic repair on restart should things go wrong.
    b. a 16Mb System partition.

    Click image for larger version. 

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      My ComputerSystem Spec
  3.    24 Jan 2017 #3
    Join Date : Jul 2015
    Posts : 9,395
    Windows 10 Pro

    You should be able to delete that middle EFI system partition. This is what I would do. Make a bootable USB flash drive or DVD of Kyhi's recover tools:
    Windows 10 Recovery Tools - Bootable Rescue Disk

    Boot the computer from it (to make sure it works, for one reason). Use Macrium Reflect Free to make an image backup of both the EFI System partitions. You can use AEOMI partition assistant on the same flash drive/DVD to delete the middle EFI system partition, then reboot the computer from the HDD/SSD. If it has a problem, boot back to Kyhi's recovery tools and restore the EFI system partition you deleted from the backup image and then attempt to delete the other EFI system partition from the HDD/SSD.
      My ComputerSystem Spec
  4.    24 Jan 2017 #4
    Join Date : Aug 2015
    Posts : 5
    Windows 8.1
    Thread Starter

    Quote Originally Posted by NavyLCDR View Post
    You should be able to delete that middle EFI system partition. This is what I would do.
    Thanks for the reply!

    I was wondering a thing: can I boot Ubuntu from USB, then delete that middle partition using the manual partition manager in the installer, and finally extend the main partition of my HDD on Windows?
      My ComputerSystem Spec
  5.    24 Jan 2017 #5
    Join Date : Jul 2015
    Posts : 9,395
    Windows 10 Pro

    Quote Originally Posted by FonzTech View Post
    Thanks for the reply!

    I was wondering a thing: can I boot Ubuntu from USB, then delete that middle partition using the manual partition manager in the installer, and finally extend the main partition of my HDD on Windows?
    Not sure. I know you would be able to with the partitioning program on Kyhi's recovery drive.
      My ComputerSystem Spec
  6.    24 Jan 2017 #6
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,153
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    Quote Originally Posted by FonzTech View Post
    Thanks for the reply!

    I was wondering a thing: can I boot Ubuntu from USB, then delete that middle partition using the manual partition manager in the installer, and finally extend the main partition of my HDD on Windows?
    From Windows, just use diskpart to delete the partition. Open admin comnmand prompt and type:
    diskpart
    select disk 0
    select partition 3
    delete partition override
    exit

    NOTE: I am assuming you want to delete the partition next to C drive which is partition 3.
    Last edited by topgundcp; 24 Jan 2017 at 21:01.
      My ComputerSystem Spec
  7.    24 Jan 2017 #7
    Join Date : Aug 2015
    Posts : 5
    Windows 8.1
    Thread Starter

    Thanks, topgundcp!!! I knew that command would have worked, but I was afraid of losing my data.
    Now I have also expanded my C:\ drive, filling the remaining 100 MB.
      My ComputerSystem Spec

 


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