PowerEdge: Server BIOS Update Guidelines for Microsoft Secure Boot Certificates

Summary: Before updating Dell PowerEdge servers running Windows to the December 2025 BIOS release, complete the required pre-requisites. The BIOS update includes new Secure Boot Certificates, and failure to follow the steps below may result in the server entering an undefined state. If Secure Boot is not enabled, the BIOS can be updated through the normal process and this document is not applicable. Note: This document is applicable only if the server has Secure Boot enabled, TPM enabled, and running the Windows Server operating system. ...

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Instructions

Failure to follow the steps below may result in the server entering an undefined state.

Undefined State Symptoms:

  1. Entering BitLocker Recovery screen during system boot.
  2. Azure Stack or local registration status showing "Out of Policy" error. https://learn.microsoft.com/en-us/previous-versions/azure/azure-local/deploy/troubleshoot-hci-registration#out-of-policy-errorThis hyperlink is taking you to a website outside of Dell Technologies.

 

Targeted Servers and Operating Systems

All PowerEdge 14th, 15th, and 16th generations of servers running Windows Server or Azure Stack HCI

 

Server Generations and BIOS Identifiers

Below are the details of BIOS versions released for different generations of Dell PowerEdge servers which include Microsoft Secure Boot certificates 2023.
 

Platform

BIOS Version

R260, R360, T160, T360

 2.4.0

R660, R760, R860, R760XD2, R760XA, XE8640, XE9680, HS5620, XR7620, R760XS, XR5610, XR8610T, XR8620T, R960, T560, MX760C, XC760, VS-760, XC660, XC760XD2, VE660, VP-760, XC660XS, XC760XA, VP-760XA

 2.8.2

 R6625, R7625

 1.15.3

C6615

 1.10.3 

R6615, R7615

 1.15.3

R750, R750xa, R750xs, R650, R650xs, R550, R450, C6520, MX750c, T550

 1.19.2

XR4510c, XR4520c

 1.21.1

R350, R250, T350, T150

 1.13.0

R6515, R7515

 2.22.0 

R6525, R7525

 2.22.0

R7425

1.23.0

R7415, R6415

1.23.0

R740, R740XD, R640, R940

 2.25.0

C4140

 2.25.0 

R840, R940XA

 2.25.0

T640

 2.25.0

R540, R440, T440

 2.25.0 

R740XD2

 2.25.0 

MX740C

 2.25.0 

MX840

 2.25.0

M640, FC640, M640(VRTX)

 2.25.0

C6420

 2.25.0

XE7420, XE7440

 2.25.0

XE2420

 2.25.0

R340, T340, R240, T140

 2.21.0

 

Pre-Requisites

  • Server must be running a BIOS version released prior to the versions noted above. 
  • Server must have TPM2.0, and it should be active.
  • Secure Boot should be enabled.
  • BitLocker should be disabled. If BitLocker is already in use, it should be temporarily disabled.
  • Users should have administrative rights for the server.
  • PowerShell Execution Policy should be set to 'Unrestricted' or 'Bypass'. (Use Set-ExecutionPolicy command)


Note: The following files may only be attached to the English version of this article.

Steps to Update Secure Boot Certificates and BIOS.

  1. Ensure that the server is running a BIOS version prior to what is noted above.
  2. System should be running the Windows Server 2025, Windows Server 2022, or HCI operating system.
  3. Download Secure Boot certificates and scripts attached to this KB.
  4. Copy the Secure Boot certificates to the system.
    1. For 16G - Copy 16G_Secure_Boot_Cerifcates_pkb.zip and extract into any folder.
    2. For 15G - Copy 15G_Secure_Boot_Cerifcates_pkb.zip and extract into any folder.
    3. For 14G - Copy 14G_Secure_Boot_Cerifcates_pkb.zip and extract into any folder. 
  5. Run the appropriate script to update Secure Boot certificates. 
    1. For 16G: 16G_SecureBoot_Cert_Update_pkb.ps1
    2. For 15G: 15G_SecureBoot_Cert_Update_pkb.ps1
    3. For 14G: 14G_SecureBoot_Cert_Update_pkb.ps1
    4. The path of the folder where all the required certificate files are stored, must be provided as input.
  1. Ensure that the script runs successfully and a reboot message appears.
  2. Reboot the server.
    1. NOTE: UEFI0074 warning "The Secure Boot policy has been modified since the last time the system was started" may appear during BIOS POST and in the Lifecycle log.
  3. Once the server reboots into the operating system, update the BIOS by any update tool/mechanism supported by Dell (Dell Update Package, iDRAC, OpenManage Enterprise, etc).
  4. Reboot the server again.
  5. Verify that the server is running the new BIOS.
  6. Dell suggests checking that the new secure boot certificates are available in the BIOS. This is done by running the following script from within the operating system.
    1.  Check UEFI KEK, DB, and DBX.ps1
    2. This script can be downloaded from here: GitHub: Check-UEFISecureBootVariablesThis hyperlink is taking you to a website outside of Dell Technologies.

 

When the script is run, the output below is expected. 

 Check that new Secure Boot Certificates are available. 

Affected Products

Dell XC Core XC660, Dell XC Core XC660xs, Dell XC Core XC760, Dell XC Core XC760xa, OEMR R240, OEMR R250, OEMR R260, OEMR R340, OEMR R350, OEMR R360, OEMR R440, OEMR R450, OEMR R540, OEMR R550, OEMR R640, OEMR R6415, OEMR R650, OEMR R650xs , OEMR R6515, OEMR R6525, OEMR R660, OEMR R6615, OEMR R6625, OEMR R740, OEMR R740xd, OEMR R740xd2, OEMR R7415, OEMR R7425, OEMR R750, OEMR R750xa, OEMR R750xs, OEMR R7515, OEMR R7525, OEMR R760, OEMR R760xa, OEMR R760XD2, OEMR R7615, OEMR R7625, OEMR R840, OEMR R860, OEMR R940, OEMR R940xa, OEMR R960, OEMR T140, OEMR T150, OEMR T340, OEMR T350, OEMR T360, OEMR T440, OEMR T550, OEMR T560, OEMR T640, OEMR XR4510c, OEMR XR4520c, OEMR XR5610, OEMR XR7620, OEMR XR8610t, OEMR XR8620t, Poweredge C4140, PowerEdge C6420, PowerEdge C6520, PowerEdge C6615, PowerEdge FC640, PowerEdge HS5620, PowerEdge M640, PowerEdge M640 (for PE VRTX), PowerEdge MX740C, PowerEdge MX750c, PowerEdge MX760c, PowerEdge MX840C, PowerEdge R240, PowerEdge R250, PowerEdge R260, PowerEdge R340, PowerEdge R350, PowerEdge R360, PowerEdge R440, PowerEdge R450, PowerEdge R540, PowerEdge R550, PowerEdge R640, PowerEdge R6415, PowerEdge R650, PowerEdge R650xs, PowerEdge R6515, PowerEdge R6525, PowerEdge R660, PowerEdge R6615, PowerEdge R6625, PowerEdge R740, PowerEdge R740XD, PowerEdge R740XD2, PowerEdge R7415, PowerEdge R7425, PowerEdge R750, PowerEdge R750XA, PowerEdge R750xs, PowerEdge R7515, PowerEdge R7525, PowerEdge R760, PowerEdge R760XA, PowerEdge R760xd2, PowerEdge R7615, PowerEdge R7625, PowerEdge R840, PowerEdge R860, PowerEdge R940, PowerEdge R940xa, PowerEdge R960, PowerEdge T140, PowerEdge T150, PowerEdge T160, PowerEdge T340, PowerEdge T350, PowerEdge T360, PowerEdge T440, PowerEdge T550, PowerEdge T560, PowerEdge T640, PowerEdge XE2420, PowerEdge XE7420, PowerEdge XE7440, PowerEdge XE8640, PowerEdge XE9680, PowerEdge XR4510c, PowerEdge XR4520c, PowerEdge XR5610, PowerEdge XR7620, PowerEdge XR8610t, PowerEdge XR8620t, VxRail VE-660, VxRail VP-760, VxRail VS-760 ...

Attachments

16G_Secure_Boot_Cerificates_pkb_en_US_1.zip 15G_SecureBoot_Cert_Update_pkb_en_US_1.ps1 15G_Secure_Boot_Certificates_pkb_en_US_1.zip 14G_SecureBoot_Cert_Update_pkb_en_US_1.ps1 16G_SecureBoot_Cert_Update_pkb_en_US_1.ps1 14G_Secure_Boot_Cerifcates_pkb_en_US_1.zip

Article Properties
Article Number: 000402373
Article Type: How To
Last Modified: 12 كانون الثاني 2026
Version:  1
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