Windows Boot Manager Failed to Start (Code 0xc0000225)

The error message Windows Boot Manager failed appears if the Master Boot Record is corrupted. You are going to learn at least two ways to fix the error - Windows Boot Manager failed to start. By the way, if you want to recover data from a computer that won't boot, you can download EaseUS hard disk data recovery software.

Table of Contents

BOOTMGR, Windows Boot Manager, is the boot manager used to start Windows 10, Windows 8, Windows 7, and Windows Vista. When you power on your system, Windows Boot Manager executes the winload.exe file and loads your system successfully.

windows boot manager failed to start

Why Does Windows Boot Manager Fail to Start

If the Master Boot Record is corrupted, The error message Windows boot manager boot failed appears. The most common reasons are:

  • Malware infections
  • Damaged MBR (Master-Boot-Record)
  • Hardware/software missing
  • Improper shutting down of your computer

"Windows Failed to Start" is a common error that is displayed on your screen soon after the Windows Boot Manager has failed. As you know, this error message appears if the Master Boot Record (MBR) is corrupted. Thus, Windows 10 Boot Manager failed to find the OS loader mainly due to damaged MBR. You can fix the MBR to solve the "Windows Boot Manager Boot Failed" issue.

  1. 1. Run Bootrec.exe to Rebuild BCD
  2. 2. Rebuild MBR to Fix Windows Boot Manager Failed to Start

Method 1. Run Bootrec.exe to Rebuild BCD

Windows has a built-in tool - Bootrec. It can fix MBR for the Windows Boot Manager failed to start issue with easy steps. Follow the steps below to rebuild BCD.

Step 1. When you start Windows 10, Press F8 to go to the Windows Recovery Menu.

Step 2. Choose "Troubleshoot > Advanced" options to get into the Automatic Repair menu.

Step 3. Select the "Command Prompt" to use the Bootrec.exe tool. And input the following commands, and run them one by one:

how to fix Windows Boot Manager failed

  • bootrec /RebuildBcd
  • bootrec /fixMbr
  • bootrec /fixboot
  • bootsect /nt60 SYS or bootsect /nt60 ALL

Enter exit when the repair process completes. You can try to boot your computer again to see if you have solved the error.

Method 2. Rebuild MBR to Fix Windows Boot Manager Failed to Start

If you are not good at using CMD commands, you can use the alternative to rebuild MBR. EaseUS Partition Master makes MBR rebuilding easy and fast. This software can manage hard drive partitions and troubleshooting the Windows Boot Manager error under WinPE. Follow these steps to rebuild MBR.

Step 1. Create a WinPE bootable disk

  • Launch EaseUS Partition Master, click "WinPE Creator" on the toolbar. Select to create the bootable disk on a USB drive. If your computer has a CD/DVD drive, you can also create the bootable disk to CD/DVD.
  • Click "Proceed" to finish the process.
create a bootable disk

Step 2. Boot EaseUS Partition Master Bootable USB

  • Connect the bootable USB or CD/DVD to your PC. 
  • Press F2 or Del when you restart the computer to enter the BIOS screen. Set and boot your computer from "Removable Devices" or "CD-ROM Drive". And then EaseUS Partition Master will run automatically.
rebuild MBR

Step 3. Rebuild MBR

  • Right-click the disk whose MBR is damaged. Choose "Rebuild MBR" to continue.
  • Select the type of MBR with the current operating system. Then, click "OK".
rebuild MBR
  • Click the "Execute Operation" button at the top-left corner and click "Apply" to build the MBR. After that, your computer can boot normally again.
rebuild MBR

The Windows boot manager boot failed problem in Windows 10 should be solved. This disk management tool also allows you to convert MBR to GPT, partition a hard drive, and format a hard drive.

Additional Help - How to Restore Lost Data After the Error

If you lost data after the error (code 0xc0000225), you can restore data even your computer can't load correctly. You know, you can deal with this issue by asking an expert for help. But the very first thing you need to do is export or restore your data so that you don't have to lose any precious data at all.

EaseUS Data Recovery Wizard WinPE Edition is the tool that can completely retrieve lost files, pictures, documents, videos, after deleting, formatting, partition loss, OS crash, virus attack, and other data loss scenarios.

Follow the step-by-step guide to recover files from an unbootable PC:

Step 1. Create a bootable disk

Prepare an empty USB. If you have important data on it, copy the data to another device. When you create a bootable disk, the data on the USB will be erased. EaseUS Data Recovery Wizard WinPE Edition will help you create a bootable disk.

Connect the USB drive to PC, launch EaseUS Data Recovery Wizard WinPE Edition. Select the USB drive and click "Create" to create a bootable disk.

create a bootable disk with easeus

Step 2. Boot from the bootable USB

Connect the bootable disk to PC that won't boot and change your computer boot sequence in BIOS. For most users, it works well when they restart their computer and press F2 at the same time to enter BIOS. Set to boot the PC from "Removable Devices" (bootable USB disk) or "CD-ROM Drive" (bootable CD/DVD) beyond Hard Drive. Press "F10" to save and exit.

Step 3. Recover files/data from a PC/laptop hard drive that won't boot

When you boot from the USB, you can run EaseUS Data Recovery Wizard from the WinPE bootable disk. Select the drive you want to scan to find all your lost files. 

selet the drive

Click "Scan" to start the scanning process.

let the software scan the drive

Recover data from the computer or laptop. After the scan completed, you can preview all recoverable files, select the targeted files, and click the "Recover" button to restore your files. You'd better save all of the recovered data to another place to avoid data overwriting.

recover data from the computer

Conclusion

Windows Boot Manager failed to boot is a common error. The two solutions above can solve your error. If you fail to fix the error, recover data first and turn to a professional.

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Updated by Brithny

Brithny is a technology enthusiast, aiming to make readers' tech life easy and enjoyable. She loves exploring new technologies and writing technical how-to tips. On her spare time, she loves sharing things about her favorite singer - Taylor Swift on her Facebook or Twitter.

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