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 AUTO 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 package 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 a potential issue with binary image measurement using the Linux UEFI shim boot loader.
- Fixed the issue where the system stops responding when an incorrectly formatted password is entered at the BIOS Security Manager (BIOS preboot password) prompt.

Enhancement:
- Added BIOS Password Feature: Master Password Lockout.
- Updated the Embedded Controller Engine Firmware.
- Updated the Intel Video BIOS Firmware.
- Improved the Memory DDR4 2666 MHz CMD Equalization.
Read More

Version

1.3.8, 1.3.8

Release date

14 Aug 2018

Download Type

System BIOS

Category

BIOS

Importance

Critical
Dell Technologies highly recommends applying this important update as soon as possible. The update contains critical bug fixes and changes to improve functionality, reliability, and stability of your Dell system. It may also include security fixes and other feature enhancements.
Available formats View Important Information
File Format: Flash BIOS executable
File Name: Latitude_5X91_Precision_3530_1.3.8.exe
File Size: 10.89 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. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.
MD5:
712c1b4b075f772ade7e6010f476c50d
SHA1:
f94ee332a5e90c6d24e9fa6de185fbed1a8a99cf
SHA-256:
7d4d8e1a9ee27301c4c6a75baf2ad20d34b3db979385ca451fb9b1edcb077f68
File Format: External release notes
File Name: Latitude_5X91_Precision_3530_1.3.8.txt
File Size: 2.42 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:
55f489c5b78ce47adb57f16a90b99eb6
SHA1:
41436c015ca6697b95b45340c5c492882cf74914
SHA-256:
b7a22e9b43d7f073731a3925e4ae026f822cf75c3c328035549f505647df2217

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

Additional details

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- Once upgraded, you cannot downgrade BIOS EXE/Recovery (RCV) to the 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 and usage guide.

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