Do not turn off your computer or disconnect from the power source while updating the BIOS as this could harm your computer. During the update, your computer will restart and you may briefly see a black screen.

Before updating, please read the installation instructions and important information noted below.

Dell Latitude 5491/5591 and Precision 3530 System BIOS

Restart required Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
This package contains the Dell system BIOS update. BIOS is a firmware that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives, and other devices.
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Fixes & Enhancements

Fixes:
- Fixed the issue where the system stops responding when you hot swap a Dell dock that is connected to an external monitor.
- Fixed the issue where an incorrect Windows operating system logon message is displayed when the Windows 10 secure sign-in feature is enabled.

Enhancements:
- Updated Thermal Algorithm to improve the performance of the system.
- Updated the embedded controller engine firmware.
- Replaces the Absolute Software service from Computrace to Absolute Persistence Module service.
- Enhanced the supportability for BIOS attribute management through Windows Management Instrumentation service.
Read More

Version

1.5.0, 1.5.0

Release date

06 Dec 2018

Download Type

System BIOS

Category

BIOS

Importance

Recommended
Dell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.
Available formats View Important Information
File Format: CPG BIOS Executable for Windows/DOS
File Name: Latitude_5X91_Precision_3530_1.5.0.exe
File Size: 11.14 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format consists of a BIOS executable file. The Universal (Windows/MS DOS) format can be used to install from any Windows or MS DOS environment.
To ensure the integrity of your download, please verify the checksum value.
MD5:
7ad3a658b8eda6f13fb51e1e52119b92
SHA1:
e9fc9ca5262681de64a5537ce82ffe213db0f468
SHA-256:
21918532f7c5492aefdd6c1d59c3a92d23b5b933b33f6343b576c50897f5e23f
File Format: External release notes
File Name: Latitude_5X91_Precision_3530_1.5.0.txt
File Size: 4.36 KB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format contains plain text which can be viewed with a standard text editor.
To ensure the integrity of your download, please verify the checksum value.
MD5:
ca2b67ab026dffaecc014223cac8e860
SHA1:
55009b1b5710d7ceb6aad48612a70321b6e37c1c
SHA-256:
b9d5df9f4611c3362399130d8317e00119b10c122721c4558fda1390d9ea6c65

By downloading, you accept the terms of the Dell Software License Agreement.

Additional details

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Once the BIOS is updated, you cannot downgrade it to a version before 1.1.6.
Latitude 5491, 5591, Precision 3530
Updating the BIOS from Windows

Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If it is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.

Download and Installation
1. Click Download File, to download the file.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file and double-click the new file.
The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, system restarts again.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting guide

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