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How to fix secure booting error Error Code 1003?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Secure booting error error code 1003 happens when the device is unable to verify the digital signature of the software. This can happen for a variety of reasons, including a corrupted or damaged software image, a missing or incorrect digital signature, or a hardware issue.

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1. Restart the computer and enter BIOS Setup (the key to press varies between computer manufacturers)

To restart the computer and enter BIOS Setup:

  1. Hold down the Shift key and press the Restart button.
  2. Select the proper boot device from the list and press the Enter button.
  3. Select the proper BIOS setup option and press the Enter button.
  4. Select the Security tab and press the Enter button.
  5. Select the Enable secure boot check box and press the Enter button.
  6. Enter the administrator password and press the Enter button.
  7. Click the Save button.
  8. Click the Exit button.
  9. Reinstall the operating system.

2. In BIOS Setup, go to the Security tab

  1. In BIOS Setup, go to the Security tab.
  2. In the Security screen, you will see a list of security options.
  3. Select the Enable Secure Boot check box and press the Enter key.
  4. In the Secure Boot screen, you will see an error code.
  5. To fix the secure booting error code 1003, you need to update the boot loader.
  6. To update the boot loader, go to the Boot menu in BIOS Setup and select the Boot from CD or USB option.
  7. In the CD or USB drive selection screen, select the bootable CD or USB drive that contains the boot loader update file.
  8. Click the OK button to start the boot loader update process.
  9. Once the boot loader update is complete, restart your computer.

3. If Secure Boot is "Enabled", change it to "Disabled"

To disable secure boot, follow these steps:

  1. From the Start menu, select Settings.
  2. In the Settings window, select System and Security.
  3. In the System and Security window, select Secure Boot.
  4. In the Secure Boot window, select Disable.
  5. Click OK.

4. Save your changes and exit BIOS Setup

  1. Save your changes and exit BIOS Setup by pressing the <F2> key.
  2. Click the <Delete> key to delete the current boot menu entry.
  3. Add a new boot menu entry by pressing the <F5> key.
  4. Enter the following values in the corresponding fields:
  • Name: Boot from hard drive
  • Drive: C:
  • Option: boot from CD/DVD
  1. Select the <Enter> key to boot from the newly created boot menu entry.
  2. If the boot from hard drive option is not available, you may need to update your BIOS. See the BIOS update section for more information.

5. Boot from the Windows installation media

The steps to boot from the Windows installation media and fix secure booting error error code 1003 are as follows:

  1. Insert the Windows installation media into your computer.
  2. Click the "Start" button and then click "Computer."
  3. In the "Computer" window, click the "Boot" tab.
  4. Click the "Repair" button.
  5. Select the "Secure Boot" option.
  6. Click the "Update" button.
  7. Click the "Restart" button.
  8. After the computer restarts, the Secure Boot option should be enabled.
  9. Click the "Exit" button.
  10. In the "Boot Options" window, select the "Windows installation media" option.
  11. Click the "Start" button.
  12. In the "Select a device" window, select the "Windows installation media" option.
  13. After the Windows installation media is booted, the Secure Boot option should be disabled.
  14. Click the "Close" button.

Some users might also have success with the following opitons:

  1. On the "Where do you want to install Windows?" screen, choose "Repair your computer".
  2. On the "Choose an option" screen, choose "Troubleshoot".
  3. On the "Advanced options" screen, choose "Command Prompt".
  4. At the command prompt, type the following commands, pressing Enter after each command:
  5. bcdedit /set {bootmgr} path \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI
  6. bootrec /fixboot
  7. Exit the command prompt and restart the computer.