Installing 32-bit Windows on UEFI

Installing 32-bit Windows on a 64-bit UEFI system using Rubber Boot

Abstract: Learn how to install a 32-bit version of Windows 10 on a 64-bit UEFI system using the Rubber Boot method.

Created: 2024-12-08 by

Introduction

Although modern computers often come with 64-bit UEFI systems, there are still situations where you might want to install a 32-bit version of Windows 10. One such scenario is when you're working with older hardware or software that only supports 32-bit operating systems. In this article, we'll walk you through the process of installing a 32-bit Windows 10 system on a 64-bit UEFI machine using Rubber Boot.

Prerequisites

Before we begin, make sure you have the following:

  • A 64-bit UEFI system with at least 4GB of RAM
  • A valid 32-bit Windows 10 installation media
  • Rubber Boot (a multiboot manager for UEFI systems)

Installing Rubber Boot

Follow these steps to install Rubber Boot:

  1. Download and extract the Rubber Boot package:
    2. $ wget https://github.com/RubberDuckyTeams/RubberBoot/releases/download/v1.2.1/RubberBoot-v1.2.1.zip $ unzip RubberBoot-v1.2.1.zip
  2. Create a new EFI partition:
    3. $ sudo fdisk -l

    Identify the partition you want to use for the EFI system and create a new FAT32 partition if needed:

    $ sudo mkfs.vfat /dev/sdaX
  3. Mount the EFI partition:
    4. $ sudo mount /dev/sdaX /mnt
  4. Copy the Rubber Boot files to the EFI partition:
    5. $ sudo cp RubberBoot-v1.2.1/RubberBoot.efi /mnt/EFI/BOOT/
  5. Unmount the EFI partition:
    6. $ sudo umount /mnt

Creating a 32-bit Windows 10 entry in Rubber Boot

Follow these steps to create a new entry for the 32-bit Windows 10 installation:

  1. Mount the Windows 10 installation media:
    2. $ sudo mount /dev/sdXY /mnt
  2. Create a new file for the Windows 10 entry:
    3. $ sudo touch /mnt/EFI/BOOT/win10x86.cfg
  3. Edit the new file:
    4. $ sudo nano /mnt/EFI/BOOT/win10x86.cfg

    Add the following content:

    title Windows 10 32-bit loader (multiboot2/x86.efi)
  4. Unmount the Windows 10 installation media:
    5. $ sudo umount /mnt

Booting from Rubber Boot

Reboot your computer and press the key to enter the UEFI boot menu (usually F12 or Esc). Select the Rubber Boot entry and press Enter. Once Rubber Boot loads, select the Windows 10 32-bit entry and press Enter to start the installation process.

Conclusion

Installing a 32-bit Windows 10 system on a 64-bit UEFI machine using Rubber Boot can be a bit tricky, but with the right tools and a clear understanding of the process, it's definitely doable. In this article, we've walked you through the steps required to install Rubber Boot, create a new entry for the 32-bit Windows 10 installation, and boot from Rubber Boot to start the installation process.

References

Tags: Windows UEFI 32-bit 64-bit

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