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. It is supported on Dell Latitude 5491, 5591 and Precision 3530 systems that run Windows operating system. 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. The package also addresses Intel security advisories. The security advisory is an official statement when a product is impacted by a security vulnerability and a remedy is available.
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Fixes & Enhancements

Fixes:
- Fixed the issue where a non-US language keyboard does not work in the Dell Data Protection Encryption environment.
- Fixed the issue where the TPM setting may be unexpectedly enabled after loading the Custom User Settings in BIOS.
- Fixed the issue where the system does not pass POST when the security boot on dual UEFI mode on the Dell Command Configure tool is enabled.
- Fixed the issue where the Dell TB16 dock with USB device does not function after system resumes from sleep mode.
- Firmware updates to address security advisories INTEL-SA-00191(CVE-2018-12201, CVE-2018- 12202, CVE-2018-12203, CVE-2018-12205).
- Firmware updates to address security advisory INTEL-SA-00185 (CVE-2018-12188 CVE-2018-12190 CVE-2018-12191 CVE-2018-12192 CVE-2018-12199 CVE-2018-12198 CVE-2018-12200 CVE-2018-12187 CVE-2018-12196 CVE-2018-12185).

Enhancements:
- Supports Dell Dock Station WD19.
- Added BIOS Setup configuration of Intel(R) Active Management Technology
- Enhanced Lid Switch feature to control Lid function in BIOS setup.
- Removed the option Always Allow Dell Docks from BIOS settings. Dell dock connection and the port behavior will be controlled via the USB and Thunderbolt Adapter configuration settings under operating system environment.
- Updated the Realtek USB LAN firmware.
- Updated the Power Delivery firmware.
- Updated the Embedded Controller Engine firmware.
- Updated the Thermal Algorithm for enhancing the performance of the system.
- Added the option Always, except Internal HDD&PXE in UEFI Boot Path Security feature. This option is added to skip the admin password prompt while booting to internal hard disk drive or Preboot Execution Environment (PXE).
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Version

1.7.4, 1.7.4

Release date

30 Apr 2019

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: CPG BIOS Executable for Windows/DOS
File Name: Latitude_5X91_Precision_3530_1.7.4.exe
File Size: 11.68 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:
de291fab4b6a437e2945cc1dc0edeec2
SHA1:
0a6870fbf0cbe999d6e740e4eb00106b94df8387
SHA-256:
f4359b205fa4d796518bc676b0f7ffcaf9c530d1d730d0bc352c35b8c12d84ff
File Format: External release notes
File Name: Latitude_5X91_Precision_3530_1.7.4.txt
File Size: 8.14 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:
6f605ad4dc67c135fd60b995189b91fc
SHA1:
794cb5c1c9fa255a7455f82d07e70c50844dfde5
SHA-256:
15285b88ad5990b3af8714b9acb058e64eaf3e7f42e4de025db8b74ce5a776f3

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

Additional details

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Once the BIOS is upgraded, you cannot downgrade BIOS EXE/ Recovery (RCV) to the versions 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 BitLocker is not enabled on your system, you can ignore this step.
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 file.
4. Click Yes to open the BIOS update utility.
5. Click Update to initiate the update process. A progress bar is displayed.
6. Click Restart to restart the system once the progress bar reaches 100%.
The update process initiates at the Dell logo and an update initiation message is displayed with a progress bar. After BIOS update finishes, system will auto reboot to take effect.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting guide

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