Install Ubuntu alongside Windows 10 configured with UEFI

This procedure aims to show how to install Ubuntu alongside Windows 10 on a computer using UEFI .

It uses rEFInd to configure a boot menu for booting Ubuntu Live environment. The tool’s detailed procedure as well as other options are presented here.

Following is presented a summarized installation process:

  • First, download rEFInd and extract it, and install rEFInd,
  • Open CMD with Administrator privileges and run the following command:
    Note: (you may have to change the drive letter from S: to any available in your computer)
 mountvol S: /S 
  • In the CMD console move to the folder upper the rEFInd directory installation.

    For example, if rEFInd was installed in “C:\Program Files\refind”, so move to C:\Program Files”:
cd "C:\Program Files"
  • Next, copy the rEFInd directory to the new mounted volume “S:\” (or whatever letter you choose in your computer).
 xcopy /E refind S:\EFI\refind\ 
  • Now, navigate to the rEFInd directory in the new volume:
 cd S:\EFI\refind
  • Rename the conf file:
 rename refind.conf-sample refind.conf 
  • Run the bcdedit utility to configure the boot partition.

Important: Note that {bootmgr} is entered as such; that’s not a notation for a variable.

Also, change refind_x64.efi to refind_ia32.efi on systems with 32-bit EFIs. Such computers are rare, and most of them are tablets. Check your Windows bit depth to determine which binary you should use.

bcdedit /set {bootmgr} path \EFI\refind\refind_x64.efi 
  • Download EaseUS Partition Master Free and run it.
  • Select your last partition.
 EaseUS Partition Master Free - Partition Selection
EaseUS Partition Master Free – Partition Selection
  • Right-click on it and from the context menu select Resize/Move partition.
 EaseUS Partition Master Free  - Partition resize
EaseUS Partition Master Free – Partition resize
  • From the size shown beside Partition Size minus 4096 MB (to mimic a 4GB pen-drive).
  • Press tab and the rest will be auto-completed.
EaseUS Partition Master Free  - Shrink partition in 4GB
EaseUS Partition Master Free – Shrink partition in 4GB
  • Select the newly created partition and right-click on it. Select Create Partition from the context menu.
EaseUS Partition Master Free  - Create new partition in 4GB
EaseUS Partition Master Free – Create new partition in 4GB
  • In this window, select FAT32 as the File System. Click on OK. Finally, click on Apply (present at the top-left of the window).
EaseUS Partition Master Free  - new partition creation
EaseUS Partition Master Free – new partition creation
  • Next, extract the Ubuntu ISO into this partition and reboot the computer.
  • You will be presented with a rEFInd menu. From here select the Ubuntu partition. It will boot into a Live environment. Continue with the installation.

Cleaning up the changes

  • After the installation finishes boot to Windows.
  • Run EaseUS Partition Master Free again.
  • Right-click on the 4 GB partition and from the context menu select Delete Partition.
EaseUS Partition Master Free  - Delete partition
EaseUS Partition Master Free – Delete partition
  • Right-click on the partition above the Unallocated partition and select “Resize/Move Partition” from the context menu.
EaseUS Partition Master Free  - Delete partition
EaseUS Partition Master Free – Delete partition
  • Extend the bar to the extreme right by dragging the button.
EaseUS Partition Master Free  - Delete partition
EaseUS Partition Master Free – Delete partition
  • Click on OK.
  • Finally, click on Apply (present at the top-left of the window).
EaseUS Partition Master Free  - Delete partition
EaseUS Partition Master Free – Delete partition
  • Open a new command prompt with Administrative privileges and mount the volume again:
mountvol S: /S
  • Remove rEFInd:
rmdir "S:\EFI\refind" /S /Q 
  • Reinstall grub as your primary boot manager:
bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi 

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