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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.
The issue is due to the Microsoft UEFI Certificate Authority (CA) disabled by default in the BIOS.
To resolve, enable Microsoft UEFI CA in the BIOS. 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 . Go to Boot Configuration Menu . Ensure that Enable Microsoft UEFI CA is On. 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 .
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