BIOS Update Through Windows Update Fails on Computers with a Discrete Graphics Processing Unit (GPU)
概要: This article gives information about a scenario where a Dell BIOS update fails when done through Windows Update.
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現象
Dell BIOS Update Fails
Computers with integrated Unified Memory Architecture (UMA) video cards: Windows Update downloads and installs the Dell BIOS update without any issues.
Computers with discrete nonintegrated video cards: Windows Update downloads the Dell BIOS update, then reboot, but the update fails. Windows Device Manager shows a yellow bang next to System Firmware.
This behavior happens on both Windows 10 and 11 with BitLocker enabled.
原因
Most computers enable BitLocker during the Windows Out of Box Experience (OOBE). During this process Windows binds BitLocker Platform Configuration Registers (PCR) depending on installed hardware.
When a computer needs a BIOS update, BitLocker must be suspended to ensure that the update can be successfully applied, and the computer does not boot into Windows Recovery mode.
Dell tools like Dell Command Update and Dell Update contain integrated logic that automatically suspends BitLocker before applying the update.
Windows Update does not contain a similar integrated logic when certain PCR bindings are used.
解決方法
Suspend BitLocker for BIOS Updates
Workaround:
The current workaround is to manually suspend BitLocker and then reboot the computer. Windows will then attempt the BIOS update on reboot.
Open a Command Prompt with Admin Rights (The Command Prompt: What It Is and How to Use It on a Dell System). Type the following command: Suspend-BitLocker -MountPoint "C:" -RebootCount 0
This command suspends BitLocker encryption on the BitLocker volume that is specified by the MountPoint parameter. Because the RebootCount parameter value is 0, BitLocker encryption remains suspended until you run the Resume-BitLocker cmdlet.
Once the BIOS update is successful. Type the following command: Resume-BitLocker -MountPoint "C:"
Additional Information:
Automatic Windows Device Encryption or BitLocker on Dell Computers
対象製品
Alienware, Dell All-in-One, Dell Pro All-in-One, Dell Pro Max Micro, Dell Pro Max Slim, Dell Pro Max Tower, Dell Pro Micro, Dell Pro Slim, Dell Pro Tower, Dell Slim, Dell Tower, Inspiron, OptiPlex, Vostro, XPS, G Series, G Series, Alienware
, Dell Laptops, Dell Plus, Dell Pro, Dell Pro Max, Dell Pro Plus, Dell Pro Premium, Inspiron, Latitude, Dell Pro Rugged, Vostro, XPS, Fixed Workstations, Mobile Workstations, Dell Pro Max Micro XE FCM2250, Dell Pro Max Slim XE FCS1250, Dell Pro Max Tower T2 XE FCT2250, Dell Pro Max 16 XE MC16250, Dell Pro Micro Plus XE QBM1250, Dell Pro Slim Plus XE5 QBS1250, Dell Pro Tower Plus XE5 QBT1250
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文書のプロパティ
文書番号: 000216539
文書の種類: Solution
最終更新: 22 7月 2025
バージョン: 7
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