Installing Windows 10 or 11 on Ubuntu: A Step-by-Step Guide

If you’re running Ubuntu and want to install Windows 10 or 11 for a dual-boot setup, follow this guide to create a partition, install Windows, and configure the boot manager.

Part 1: Creating a Partition for Windows

Step 1: Boot Ubuntu Live

• Insert the Ubuntu Live USB and boot from it.
• Select “Try Ubuntu” without installing.

Step 2: Install GParted

• Press Ctrl+Alt+T to open Terminal.
• Type:

  sudo apt update

  sudo apt install gparted

Step 3: Create a Partition

• Open GParted by typing:

  sudo gparted

• Right-click your Ubuntu partition and select “Resize/Move”.
• Allocate at least 20GB for Windows 10 or 64GB for Windows 11.
• Click Apply and reboot into normal Ubuntu.

Part 2: Creating a Windows Install Drive in Ubuntu

Step 1: Download Windows ISO

• Windows 11: Download here.
• Windows 10: Download here.

Step 2: Install Ventoy

• Download Ventoy.
• Extract it using:

  tar -xzvf ventoy-[version]-linux.tar.gz

• Run:

  cd Ventoy.x86_64

  chmod +x VentoyGUI.x86_64

  sudo ./VentoyGUI.x86_64

Step 3: Make USB Bootable

• Insert a blank USB and click “Install” in Ventoy.
• Copy the Windows ISO file to the USB drive.

Part 3: Installing Windows

Step 1: Boot from Windows USB

• Restart and boot from the Windows USB.
• Select language and click Next.

Step 2: Install Windows

• Click “Custom: Install Windows only (advanced)”.
• Select the partition created earlier and click Next.
• Follow the on-screen instructions to complete the installation.

Part 4: Setting Up a Boot Manager

Step 1: Install rEFInd

• Download rEFInd.
• Extract and copy the “refind” folder.

Step 2: Configure rEFInd

• Open Command Prompt as Admin and mount the EFI partition using:

  diskpart

  list disk

  select disk 0

  list partition

  select partition #

  assign letter=X

• Paste the “refind” folder into the EFI partition.

Step 3: Add rEFInd to Boot Options

• Download Easy UEFI.
• Open Easy UEFI and add rEFInd as a boot entry.
• Move rEFInd to the top of the boot order.

Step 4: Restart and Choose OS

• Reboot and select Ubuntu or Windows from the rEFInd menu.

Now you have successfully set up a Windows-Ubuntu dual-boot system!