Driver Details

Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

Dell Latitude E5520 System BIOS, A02

Latitude E5520 System BIOS A02

Fixes & Enhancements

BIOS Release Notes

Systems: Dell Latitude E5520 Series
Version: A02
Build Date: 11 July 2011

1. Added support for Signed Firmware Updates.
2. Fix "system easily hang if write data and save under DOS w/ AHCI mode."
3. Fix "LCD show black screen when resume from S3 with CPU(i5-2520)"
4. Fixed issue where the BIOS would reboot instead of flashing when the /S parameter was used
with the flash executable.
5. Integrate 1.5MB MEFW MRHF1 into Krug BIOS.
6. Update ePSA to 4208 for E3.
7. Dell GPE Feature Added to Platforms.
8. Fix "HDD slow performance with security encryption software installed on PCMCIA configuration".
9. Fix "ATA controller unaligned memory access failure"
10.Fix "After disable NIC in BIOS menu, the BIOS menu will show wrong MAC address."
11.Fix "Forced Boot to CD support for Sandybridge UMA Platforms".
12.Correct INT13 handler for ATA mode when system is under virtual x86 mode
13.Update to latest Intel microcode patch (MOB_P_11)
14.Updated Intel System Agent reference code to 1.2.0
15.Updated Intel PCH Reference Code to 1.2
16.Updated Intel PPM Reference Code to v1.2.1.1
17.Fix" System will auto shut down then reboot on DC if disable hyberThread or Multicore".
18.Fix" System cannot detect HDD when set to ATA mode and remove ODD".
19.Fix" can not boot from os install-CD with memory exceed 6G Bytes under UEFI mode".
20.Fix" HealthState result is wrong at CIM_ComputerSystem on DASH manage tool".
21.Fix" Reboot Bypass malfunction after flash BIOS".
22.Fix" System can't resume from S4 on UEFI OS when the memory size over 4G Bytes".


Version A02, A02



Release date

28 Jul 2011

Last Updated

03 Nov 2011


Available formats

File Format:Windows/DOS
File Name:E5520A02.exe
Download Type:HTTP
File Size: 2 MB
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.
Not available
Not available

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

Applies to
Dell Latitude E5520
Installation instructions
Installation Instructions for the Universal (Windows/ DOS) format

  1. Download file to Desktop

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

Download file to Desktop

The file E5520A02.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.

Run the BIOS update utility from Windows environment

  1. Double click the Icon on your desktop labeled E5520A02.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 diskette. This executable file does not create the DOS system files.

  1. Copy the file E5520A02.exe to a bootable floppy.

  2. Boot from the floppy to the DOS prompt.

  3. Run the file by typing Y:\E5520A02.exe (where y is the drive letter where the executable is located).

Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

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).