Computer Fails to Boot After Enabling Dell Encryption’s Pre-Boot Authentication

Summary: The computer fails to boot when enabling the Pre-Boot Authentication for Dell Encryption Enterprise Self-Encrypting Drive or Full Disk Encryption with Secure Boot enabled.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

Affected Products:

  • Dell Encryption

Affected Platforms:

  • Latitude 3150
  • Latitude 3350
  • Latitude 3450
  • Latitude 3550
  • Latitude 5330
  • Latitude 5340
  • Latitude 5350
  • Latitude 5440
  • Latitude 5450
  • Latitude 5540
  • Latitude 5550
  • Latitude 7320
  • Latitude 7330
  • Latitude 7340
  • Latitude 7350
  • Latitude 7350 Detachable
  • Latitude 7450
  • Latitude 7640
  • Latitude 7650
  • Latitude 9430
  • Latitude 9450 2-in-1
  • Precision 3480
  • Precision 3490
  • Precision 3580
  • Precision 3590
  • Precision 5490
  • Mobile Precision 3591
  • Mobile Precision 5690

You may receive the following error during boot: Operating System Loader has no signature. Incompatible with Secure Boot. All bootable devices failed Secure Boot verification.

SecureBoot message

Cause

The issue is due to the Microsoft UEFI Certificate Authority (CA) disabled by default in the BIOS.

Resolution

To resolve, enable Microsoft UEFI CA in the BIOS.

  1. Boot into the BIOS for more information, reference the Dell Knowledge Base article How to Access UEFI (BIOS) System Setup from Microsoft Windows on your Dell Computer.
  2. Go to Boot Configuration Menu.
  3. Ensure that Enable Microsoft UEFI CA is On.
    Toggle On Enable Microsoft UEFI CA
  4. Apply Changes and Exit to reboot.

To contact support, reference Dell Data Security International Support Phone Numbers.
Go to TechDirect to generate a technical support request online.
For additional insights and resources, join the Dell Security Community Forum.

Affected Products

Dell Encryption, Latitude 5330, Latitude 5350, Latitude 7320, Latitude 7330, Latitude 7340, Latitude 7350, Latitude 3450, Latitude 5440, Latitude 5450, Latitude 7450, Latitude 9430, Latitude 9450 2-in-1, Latitude 3550, Latitude 5540, Latitude 5550 , Latitude 7640, Latitude 7650, Latitude 3350, Precision 3480, Precision 3490, Precision 5490, Precision 3580, Precision 3590, Mobile Precision 3591, Mobile Precision 5690 ...
Article Properties
Article Number: 000214969
Article Type: Solution
Last Modified: 22 Apr 2025
Version:  6
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