Convertir disque de GPT à MBR et passer de Windows 10 de l'UEFI au BIOS

Convertir disque de GPT à MBR et passer de Windows 10 de l'UEFI au BIOS

Table of Contents:

1. Introduction
2. Scenario 1: Converting Windows from GPT to MBR for an Old Machine 2.1 Using MiniTool Partition Wizard 2.2 Converting the Disk and Setting the Active Partition
3. Scenario 2: Converting Windows from UEFI to Legacy BIOS Mode 3.1 Using EaseUS Partition Master 3.2 Changing Boot Mode and Converting the Disk
4. Verifying the Conversion 4.1 Checking System Settings and Disk Properties 4.2 Modifying Drive Letters and Extending Volumes 4.3 Enabling Windows Recovery Environment
5. Conclusion

How to Convert Your Windows from GPT to MBR and UEFI to Legacy BIOS Mode

Introduction:

In this article, we will discuss how to convert your Windows operating system from GPT to MBR and from UEFI to Legacy BIOS mode. These conversions may be necessary in certain scenarios, such as when using an old machine that does not support UEFI or when faced with hardware failures. We will explore two different methods using third-party software: MiniTool Partition Wizard and EaseUS Partition Master. Additionally, we will cover the steps to verify the successful conversion and make necessary adjustments.

Scenario 1: Converting Windows from GPT to MBR for an Old Machine

If You have an external hard drive in GPT mode and want to use it on an old machine that only supports Legacy BIOS mode, you will need to convert your disk from GPT to MBR. Here's how you can do it:

Using MiniTool Partition Wizard:

1. Launch MiniTool Partition Wizard.
2. Select the disk you want to convert.
3. Right-click on the disk and choose "Convert GPT Disk to MBR Disk."
4. Follow the instructions and warnings provided by the software.
5. Set the active partition to the desired partition.
6. Apply the changes and restart the system.

Scenario 2: Converting Windows from UEFI to Legacy BIOS Mode

If you have a new machine with Windows installed in UEFI mode but want to switch to Legacy BIOS mode due to hardware failures, follow these steps:

Using EaseUS Partition Master:

1. Launch EaseUS Partition Master.
2. Select the disk you want to convert.
3. Right-click on the disk and choose "Convert GPT to MBR."
4. Change the boot mode from UEFI to Legacy in the system's firmware settings.
5. Apply the changes and restart the system.

Verifying the Conversion:

After converting your Windows installation, it is essential to verify the changes and make any necessary modifications. Follow these steps:

Checking System Settings and Disk Properties:

1. Right-click on the Start button and open Disk Management.
2. Verify that the partitioning style is set to MBR.
3. Check the disk properties to ensure the changes are applied.

Modifying Drive Letters and Extending Volumes:

1. Remove unnecessary drive letter associations for partitions.
2. Extend volumes using unallocated space if desired.

Enabling Windows Recovery Environment:

1. Open Command Prompt as an administrator.
2. Run the command "reagentc /info" to check Windows Recovery Environment status.
3. If disabled, enable it using appropriate commands.

Conclusion:

Converting your Windows operating system from GPT to MBR and from UEFI to Legacy BIOS mode may be necessary in specific situations. By following the steps provided in this article, using software like MiniTool Partition Wizard or EaseUS Partition Master, you can easily make these conversions. Remember to verify the changes, modify drive letters and volumes if required, and ensure the Windows Recovery Environment is enabled.