💎 MANUALLY REPAIRING WINDOWS 11/12 BOOTLOADER AND EFI PARTITION

🚨 SAFETY ADVISORY:
This guide involves advanced system modifications. Perform a backup before proceeding.

Safety Warning

Before proceeding with the manual repair of the Windows 11/12 bootloader and EFI partition, ensure you have backed up all important data to prevent potential loss. Manipulating system files and partitions can lead to system instability or data loss if not done correctly.

Introduction

This tutorial provides a step-by-step guide on how to manually repair the Windows 11/12 bootloader and EFI partition using the Command Prompt. It is designed for advanced users and assumes a basic understanding of command-line interfaces and system administration.

Prerequisites

To follow this guide, you will need:

• A Windows 11/12 installation media (USB or DVD)
• Access to the Command Prompt
• A basic understanding of Windows system administration

Step 1: Accessing the Command Prompt

To access the Command Prompt, follow these steps:

1. Insert the Windows 11/12 installation media and restart your computer
2. Press the key to access the boot menu (usually F12, F2, or Del) and select the installation media
3. Click on Next and then select Repair your computer
4. Click on Troubleshoot and then select Command Prompt

Step 2: Identifying the EFI Partition

To identify the EFI partition, use the following command:

         diskpart
      

Then, use the following commands to identify the EFI partition:

         list disk
         select disk 0
         list partition
      

Look for the partition with the FAT32 file system and a size of approximately 100MB. This is usually the EFI partition.

Step 3: Assigning a Drive Letter to the EFI Partition

To assign a drive letter to the EFI partition, use the following command:

         assign letter=x:
      

Replace x with a available drive letter.

Step 4: Repairing the Bootloader

To repair the bootloader, use the following command:

         bcdboot C:\Windows /s X: /f ALL
      

Replace C:\Windows with the location of your Windows installation and X: with the drive letter assigned to the EFI partition.

Step 5: Rebuilding the BCD Store

To rebuild the BCD store, use the following command:

         bcdedit /enum
      

Look for the bootloader entry and note the identifier. Then, use the following command to rebuild the BCD store:

         bcdedit /create {bootmgr} /d "Windows Boot Manager"
      

Step 6: Setting the Boot Order

To set the boot order, use the following command:

         bcdedit /set {bootmgr} path \\EFI\Microsoft\Boot\bootmgfw.efi
      

Conclusion

Manually repairing the Windows 11/12 bootloader and EFI partition can be a complex and time-consuming process. However, by following the steps outlined in this guide, you should be able to resolve common issues and get your system up and running again.