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_5420_1.5.2.exe
File size: 39.18 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: 11e81a2377b7e01ea87da9047984da6f
SHA1: 1913f03a7407091dac39dacb38be849f0de1e928
SHA-256: db3b17c476e407a5e97b98b270508ad941702be54ec1983ae679e4e3f1394396
File Format: This file format contains plain text which can be viewed with a standard text editor.
File Name: Third-party License.txt
File size: 1.17 KB
To ensure the integrity of your download, please verify the checksum value.
MD5: fcf94f322af0e9ea2c8e7653119f536e
SHA1: 38221f0be18db3b392359d21beda45372a48f723
SHA-256: 6712dba91fdc70396b373e98587ec4669e8c8b0e24e1bcda8dce94e11c96abd4
Fixes & Enhancements
- Fixed the issue where the system connected to Dell WD19 and WD19DC dock does not recognize the LAN network. This issue occurs when you connect the LAN cable after the system resumes from Hibernate state or shutdown or restart.
- Fixed the issue where progress bar is not displayed during the Preboot Execution Environment (PXE) boot.
Important Information
- Once the BIOS is upgraded, you cannot downgrade the BIOS EXE/Recovery (RCV) to versions earlier than 1.5.2. BIOS downgrades are restricted when there are security updates and important fixes with earlier versions that impact the functionality of the system.
- BIOS updates take no more than 5 minutes to be installed on your system. You can install the updates in the background while using the system.
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 BitLocker 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 power or interrupt the BIOS update process during the update. Download and Installation
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the file.
5. Click Yes to open the BIOS update utility.
6. Click Update to initiate the update process. A progress bar is displayed.
7. 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 the update finishes, the system automatically restarts.
Updating the BIOS from 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 BitLocker 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.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Installation
1. Copy the downloaded file to a USB drive. You do not need a bootable USB drive.
2. Insert the USB drive into any USB port.
3. Power on the system.
4. At the DELL logo screen, press F12 to access the one-time boot menu.
5. Select BIOS Flash Update in the Other Options section.
6. Click the ... button to browse the USB drive to locate the downloaded file.
7. Select the file and click OK.
8. Verify the existing system BIOS information and the BIOS update information.
9. Click Begin Flash Update.
10. Review the Warning message and click Yes to proceed with the update.
The system restarts and displays a Flash Progress bar at the Dell logo screen. The system restarts again when the Flash update is complete.