Latitude E5420 System BIOS

Installation Instructions for the Universal (Windows/ DOS) format

1. Download file to Desktop

2. Use one of the methods below to flash the Bios.

Run the BIOS update utility from Windows environment

Run the BIOS update utility from DOS environment (Non-Windows users)


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Download file to Desktop

The file E5420A11.exe is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.


1. Click Download now.The File Download window appears.

2. Click the Save button.The Save As window appears.

3. Select Desktop using the drop-down menu to the right of Save in.

4. Click the Save button.A progress meter moves as the download is completed.

5. If necessary, click X in the upper right-hand corner of the Download Progress Window to close it upon completion.

NOTE: Shut down all other applications prior to running the BIOS update utility. The update utility reboots your system in order to get the new BIOS loaded.

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Run the BIOS update utility from Windows environment


1. Double click the Icon on your desktop labeled E5420A11.exe.The Dell BIOS Flash window appears

2. Click the Continue button.The message Pressing OK will close all applications, shut down Windows, Flash the BIOS, then reboot. appears.

3. Click the OK button.The system will restart and the BIOS Flash will be completed.


Run the BIOS update utility from DOS environment (Non-Windows users)
NOTE: You will need to provide a bootable DOS USB key. This executable file does not create the DOS system files.

1. Copy the file E5420A11.exe to a bootable USB key.

2. Boot from the USB key to the DOS prompt.

3. Run the file by typing Y:\E5420A11.exe (where y is the drive letter where the executable is located).

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Note: Please make sure you suspend BitLocker encryption before updating BIOS on a BitLocker enabled system.
If you doesn't enable BitLocker on your system you can ignore i

Reboot will be required