Driver Details

Dell XPS 420 System BIOS, A06

Dimension XPS 420 A-candidate A06 System BIOS

Fixes & Enhancements

1.Cpu microcode update of Yorkfield / Wolfdale stepping M1, C1 & M0, C0.


Version A06, A06



Release date

28 Jul 2008

Last Updated

03 Nov 2011


Available formats

File Format:Non-Packaged
File Name:XPS420-A06.EXE
Download Type:HTTP
File Size: 683 KB
Format Description:This file format consists of a BIOS-executable file. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.
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By downloading, you accept the terms of the Dell Software License Agreement.

Installation instructions
Custom Instructions for XPS420-A06.EXE:

Installation Instructions for the Universal (Windows/ DOS)


  1. Download file to Desktop

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

Download file to Desktop

The file XPS420-A06.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


  2. Click the Save button.
    The Save As window


  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 XPS420-A06.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


  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


NOTE: You will need to provide a bootable DOS diskette. This

executable file does not create the DOS system files.

  1. Copy the file XPS420-A06.EXE to a bootable floppy.

  2. Boot from the floppy to the DOS prompt.

  3. Run the file by typing Y:\XPS420-A06.EXE (where y is the

    drive letter where the executable is located).

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Video Tutorials

Using the Latest Device Drivers (00:02:05)
Learn more about device driver software, how to check current driver versions, and use Dell's support website to download and install the latest driver versions. Closed captions available in many languages.

Drivers help and tutorials

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.

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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 the customer review specifics about the update to determine if it applies to your system. The update contains changes that impact only certain configurations, or provides new features that may/may not apply to your environment.