You can see this Error Code 0xc0000225 as you go to boot your PC. Windows show a warning that your PC has to be fixed and an ambiguous error has occurred. It also often states that the appropriate computer is not attached or cannot be reached.

This error is triggered by Microsoft Windows as it cannot find the right system files for booting. This critical knowledge is known as Boot Configuration Data or BCD Data. When you turn on your PC, it advises Windows how to boot correctly. This error is more prevalent on disks that use the newer UEFI specification of the GPT partition system than on older disks.

Since this Error Code 0xc0000225 deals with corrupted machine files, it always appears after an OS upgrade (such as upgrading from Windows 7 to Windows 10). That can even happen if the PC shuts down after a major update, from ransomware targeting system files, or also from poor hardware.

3 Methods to Fix Error Code 0xc0000225:

Fix-1 Run Automatic Startup repair-

Startup Repair can solve issues with the startup issue in Windows 10.

1. Plug in the installation media you have created (or the Windows 10 installation DVD) and set your language preferences and click on “Next“.

2. Now, click on “Repair your computer” on the bottom left corner of the Recovery Environment.

3. In the Troubleshooting window, click on “Advanced options“.

4. In the Advanced options window, click on “Startup Repair” to analyze the startup issue on your computer.

Your computer will be rebooted. Unplug the Windows 10 installation disk before the computer reboots.

Check if this helps.

 

Fix-2 Re-build BCD-

Re-build Boot Configuration Data (BCD) on your computer.

1. Plug in the installation disk and then click on “Next“.

2. Now, click on “Repair your computer” on the bottom left corner of the Recovery Environment.

3. In the Troubleshooting window, click on “Advanced options“.

4. In the Advanced options window, click on the “Command Prompt“.

5. Now, choose an account with administrative privilege. Enter your account password and click on “Continue“.

Command Prompt window should be opened in Troubleshooting mode.

6. To rebuild the boot configuration data, copy-paste this command in Command Prompt window and then hit Enter.

bootrec /rebuild bad

Press “A” from your keyboard when you will be prompted ‘Add installation to boot list‘.

7. In Command Prompt window, copy-paste these commands one by one and hit Enter after each of them execute these.

bootrec /fixmbr

bootrec /fixboot

Close Command Prompt window.

8. Coming back to click on “Turn off your PC” to shut down the computer.

9. Wait for a while.

10. Unplug the Windows 10 installation drive from your computer.

11. Start your computer and it will boot up Windows 10 normally.

Fix-3 Restore Master Boot Record (MBR)-

Restoring the Master Boot Record in your computer may solve this problem.

1. Plug in the installation disk and then click on “Next“.

2. Now, click on “Repair your computer” on the bottom left corner of the Recovery Environment.

3. In the Troubleshooting window, click on “Advanced options“.

4. In the Advanced options window, click on the “Command Prompt“.

5. Now, choose an account with administrative privilege.

6. Enter your account password and click on “Continue“.

Command Prompt window should be opened in Troubleshooting mode.

7. To rebuild the boot configuration data, copy-paste this command in Command Prompt window and then hit Enter.

bootsect /nt60 C:

When you see the message “Boot code was successfully updated on all targeted volumes“.

Close Command Prompt window.

8. Coming back to click on “Turn off your PC” to shut down the computer.

9. Wait for a while. Eject the Windows 10 installation drive from your computer.

10. Start your computer and it will boot up Windows 10 normally.

Source: Error Code 0xc0000225