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 E5420 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 for Dell Latitude E5420 system that runs on Windows and DOS operating systems. BIOS is a firmware that is embedded on a small memory chip on the computer's system board. It controls the keyboard, monitor, disk drives and other devices. This update addresses the long start-up time issue with encrypted hard drive, enhances protection of the BIOS and includes the updated version MOB_P_33 of the Intel microcode patch.
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Fixes & Enhancements

Fixes:
- Addresses the long start-up time with encrypted hard drive.
- Enhances protection of the BIOS.
- Includes the updated version of MOB_P_33 of the Intel microcode patch.

Enhancements:
-N/A
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Version

A14

Release date

17 Jan 2014

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
File Format: CPG BIOS Executable for Windows/DOS
File Name: E5420A14.exe
File Size: 2.94 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:
431358fc96d698681855e8ba42b47d6c
SHA1:
5282d1693031c65872a10a2d9ff81d3042fad343
SHA-256:
8fef5ea2dbaac0dd91b9b11663e4cf2eacfc86c50bec7db4a62a5b4d36ef0d1e

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

Additional details

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Dell Latitude E5420
Updating the BIOS through Windows
1. Click Download File, to download the file.
2. When the File Download window is displayed, 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.
Windows System restarts automatically and updates BIOS at the system startup screen.
After BIOS update is completed, system will reboot automatically to take effect.

Updating the BIOS from a DOS environment with Legacy boot mode (Non-Windows users)
1. Copy the downloaded file to a bootable DOS USB drive.
2. Power on the system and then Press F12 key and Select USB Storage Device and Boot to DOS prompt.
3. Run the file by typing copied file name where the executable file is located.
DOS System restarts automatically and updates BIOS at system startup screen.
After BIOS update is completed, system will reboot automatically to take effect.

Updating the BIOS from a DOS environment with UEFI boot mode (Non-Windows users, Load Legacy Option Disabled)
1. Copy the downloaded file to a bootable DOS USB drive.
2. Power on the system and then go to BIOS Setup by pressing F2 key and go to General > Boot Sequence > Boot > Boot List Option.
3. Change UEFI to Legacy of Boot List Option.
4. Go to Exit > Save Changes and reboot system.
5. Press F12 and then Select USB Storage Device and Boot to DOS prompt.
6. Run the file by typing copied file name where the executable file is located.
DOS System restarts automatically and updates BIOS at system startup screen.
After the BIOS update is finished, system will reboot automatically.
7. Go to BIOS Setup by pressing F2 key and go to General > Boot Sequence > Boot > Boot List Option.
8. Change Legacy to UEFI Boot Option.
9. Go to Exit > Save Changes and reboot system.

Note 1: You must provide a bootable DOS USB drive. This executable file does not create the DOS system files.
Note 2: Ensure that you suspend BitLocker encryption before updating BIOS on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

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