Download Files
File Format: 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.
File Name: Latitude_5X91_Precision_3530_1.9.0.exe
File size: 12.15 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: d79838792e0282ae5550ec668a9a2b17
SHA1: ed85fa97c80b87491c9375974de47d78384f376d
SHA-256: a10c42d846400083f6eef9f1c7a31811700d5fa1e986f1d150da326c8a17f1a3
Fixes & Enhancements
Fixes:
- Fixed the fan noise issue that occurs when the system gets overheated after it resumes from sleep mode.
Enhancements:
- Updated the Embedded Controller Engine firmware.
- Updated the Thermal Algorithm to enhance the system performance.
- Updated the alert message that is displayed when Dell Thunderbolt Dock WD19TB is connected to systems with Non-Thunderbolt port.
- Added BIOS option to bypass the Dock warning messages.
Important Information
Once the BIOS is upgraded, you cannot downgrade BIOS EXE/ Recovery (RCV) to the versions before 1.1.6.
Supported Operating Systems
Installation instructions
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 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.
Updating the BIOS from the BIOS Boot Menu, independent of operating system
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. Copy the downloaded file to a USB flash device. It does not need to be bootable.
3. Insert the USB flash device into any USB port.
4. Power on the system.
5. At the DELL logo screen, press F12 to access the one-time boot menu.
6. Select BIOS Flash Update in the Other Options section.
7. Click the "..." button to browse the USB flash device to locate the downloaded file.
8. Select the file and click Ok.
9. Confirm the Existing System BIOS Information and the BIOS Update Information are as expected.
10. Click Begin Flash Update.
11. Reviewing the Warning message and click Yes to proceed with the update.
12. The system should restart and show a Flash Progress bar on the Dell logo screen as the BIOS update is being performed.
13. The system restarts once again when the Flash update is complete.
Applies to
Latitude 5491, 5591, Precision 3530