Unable to boot Windows 10 after converting MBR to GPT on HDD - Tech Support

Title: Windows 11 Preparation: Converting HDD from GPT to MBR for Windows 10 System

Introduction

This article aims to guide users through the process of converting a Hard Disk Drive (HDD) from the GUID Partition Table (GPT) to the Master Boot Record (MBR) system, specifically for a Windows 10 system. This conversion is necessary when preparing for an upgrade to Windows 11, as Windows 11 requires an MBR system.

Prerequisites

Before you start, ensure that you have a backup of your data. This process can potentially cause data loss if not done correctly.

Step 1: Backup Data

Backup all your data to an external drive or cloud storage. This step is crucial to prevent data loss during the conversion process.

Step 2: Check Current Partition Style

Open Command Prompt as an administrator. Type the following command and press Enter:

diskpart
list disk
select disk <Your Disk Number>
list partition

Look for the partition style. If it's GPT, proceed with the conversion.

Step 3: Convert GPT to MBR

Download and install the EaseUS Partition Master Free Edition. Launch the software and follow these steps:

1. Right-click on the GPT disk and select "Convert to MBR."
2. Click "OK" on the warning message.
3. Click "Yes" to confirm the conversion.

Step 4: Shrink and Create New Partition

1. Right-click on the partition you want to convert and select "Resize/Move."
2. Shrink the partition to create unallocated space.
3. Right-click on the unallocated space and select "Create Partition."
4. Set the partition size and file system (NTFS is recommended for Windows).
5. Click "OK" to create the new partition.

Step 5: Install Windows 10 on the New Partition

1. Insert the Windows 10 installation media.
2. Restart your computer and boot from the installation media.
3. During installation, select the new MBR partition to install Windows 10.

Conclusion

This article has guided you through the process of converting a HDD from GPT to MBR for a Windows 10 system. This conversion is essential when preparing for an upgrade to Windows 11. Always ensure to back up your data before starting the conversion process.

References

1. EaseUS Partition Master Free Edition. (n.d.). Retrieved from https://www.easeus.com/partition-master/free-partition-manager.html
2. Microsoft. (2021, May 18). Install Windows 10. Retrieved from https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/install-windows-10
3. TechRadar. (2021, April 26). Windows 11: Minimum system requirements. Retrieved from https://www.techradar.com/news/windows/windows-11-minimum-system-requirements