Fix Windows Error 0xc000000f - Rebuild BCD Guide

You are staring at a blue or black screen telling you that your PC needs to be repaired, and your heart is probably sinking right now. This typically happens when your Boot Configuration Data is corrupted or missing, leaving your computer unable to find your Windows installation.

Root Cause

Your system's Boot Configuration Data file is either damaged or missing, often due to an interrupted update, a sudden power loss, or hardware failure.

What you need

You will need a working computer to create an installation USB and a spare 8GB or larger flash drive that you do not mind formatting.

Steps

1. 01
   Create a Windows installation USB using the official Microsoft Media Creation Tool on a working computer.
2. 02
   Insert the USB into the broken PC, power it on, and repeatedly tap the BIOS key (typically F2, F12, Delete, or Esc) to enter the BIOS menu.
3. 03
   Navigate to the boot priority settings and set your USB drive as the primary boot device, then save and exit.
4. 04
   When the Windows Setup screen loads, select your language, click Next, then click 'Repair your computer' in the bottom-left corner.
5. 05
   Navigate to Troubleshoot > Advanced options > Command Prompt.
6. 06
   Type diskpart, then list volume to identify the drive letter where your Windows partition is installed (look for the largest NTFS volume).
7. 07
   Type exit to close Diskpart.
8. 08
   Run the following commands one by one: bootrec /scanos, bootrec /fixmbr, bootrec /fixboot.
9. 09
   If 'access denied' appears after bootrec /fixboot, run bootsect /nt60 sys and then run bootrec /rebuildbcd again.
10. 10
    When prompted to add the installation to the boot list, type Y for your main Windows installation and N for any older folders like Windows.old.
11. 11
    Type exit, remove the USB drive, and restart your computer.