Boot failure: a proper digital signature wasn't found (during preboot)
Last Modified: 2023-05-02 05:54:53 Etc/GMT
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Boot failure: a proper digital signature wasn't found (during preboot)
Technical Articles ID:
KB94896
Last Modified: 2023-05-02 05:54:53 Etc/GMT Environment
Drive Encryption (DE) 7.x Models (example):
Problem
The DE Preboot Authentication screen fails to display on a few systems where Secure Boot is enabled. The BIOS fails to load the DE UEFI binaries, and reports an error related to the digital signature of the binaries. Below is an error observed on One of the files on the selected boot device was rejected by the Secure Boot feature Cause
DE preboot binaries are signed using the Microsoft Windows UEFI Driver Publisher certification authority (CA). The utility is considered as a third-party CA. Research has found that on a few systems, the BIOS Secure Boot option This setting prevents the DE binaries from loading at preboot, which causes the boot failure error. Solution
Enable the Secure Boot option
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