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Driver Details

Latitude E5520 System BIOS
Latitude E5520 System BIOS A09
Release Date 9/26/2012
Importance: Recommended
Version: A09

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Previous Versions

No previous version available.


Latitude E5520 System BIOS A09

Level of Importance:Recommended

Dell recommends applying this update during your next scheduled update cycle. The update contains feature enhancements or changes that will help keep your system software current and compatible with other system modules (firmware, BIOS, drivers and software).


Latitude E5520
Operating Systems

Applies to

  • Dell Latitude E5520

Fixes & Enhancements

BIOS Release Notes Systems: Dell Latitude E5520 Series Version: A09 Release Date: 07/12/2012 Fixes/Enhancements ------------------ 1. Addressed some hard drives detection issue. 2. Added to support a new Bluetooth device. 3. Updated to the version of the Intel MEFW. 4. Updated to the MOB_P_21 version of the Intel microcode patch. 5. Address the serial device not recognized issue. Note: 1. Please note that if the A01 or before A01 BIOS is currently installed on your system, you must first update to A02 BIOS and then flash to the latest A-rev BIOS. The BIOS release has been validated on the following operating systems: 1. Microsoft Windows 7 2. Microsoft Windows Vista Service Pack 2 3. Microsoft Windows XP Service Pack 3

Installation instructions

Download file to Desktop

The  file E5520A09.EXE is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.

Click Download now.The File Download window appears.

Click the Save button.The Save As window appears.

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

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

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. 

Run the BIOS update utility from Windows environment

Double click the Icon on your desktop labeled E5520A09.EXE.The Dell BIOS Flash window appears 

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

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 diskette. This executable file does not create the  DOS system files. 

Copy the file E5520A09.EXE to a bootable floppy.

Boot from the floppy to the  DOS prompt.

Run the file by typing Y:\E5520A09.EXE (where y is the drive letter where the executable is located).            


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