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Flash BIOS update - ThinkCentre M90z
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Flash UEFI BIOS update (Flash from operating system version)
9bjy42usa.exe
2.8 MB
9BKT42A27 Mar 2013
Installation instructions for flash UEFI BIOS update (Flash from operating system version)
9bjy42usa.txt
8 KB
9BKT42A27 Mar 2013
Flash UEFI BIOS update (CD ISO image version)
9bj942usa.iso
5.38 MB
9BKT42A27 Mar 2013
Installation instructions for flash UEFI BIOS update (CD ISO image version)
9bj942usa.txt
9 KB
9BKT42A27 Mar 2013
USB drive UEFI BIOS flash package
9bjt42usa.zip
2.05 MB
9BKT42A27 Mar 2013
Windows Bios Setting Tools
9bjw42usa.exe
509 KB
9BKT42A27 Mar 2013
This package updates the basic input/output system (BIOS) on all ThinkCentre M90z systems.

BIOS is programming that controls low-level hardware operations, including interactions with diskette drives, hard drives, and the keyboard. The BIOS is stored on a chip. Your computer uses flash BIOS, which can be updated through a program on a flash diskette so that you do not have to replace the BIOS chip to update the BIOS.

Note: Make note of any settings you have changed in the BIOS Configuration Utility. These settings may have to be re-entered after updating the BIOS.
Summary of changes

version 9BKT42A

Base on 9BKT41A/9BJT41A and modify the item:

    • Update MEBX to version 6.1.0.06
    Note: Please refer to the README file under the "File details" section for a complete list of changes fixed by this driver update.

    Downloading the update
    1. In most instances, you will need only one of the listed exe or iso files.
      • If you prefer to update your BIOS from within Windows, download 9bjy41usa.exe.
      • If you prefer to update your BIOS with USB drive BIOS flash package , download 9bjt41usa.zip.
      • If you prefer to create a bootable CD to update your BIOS, download 9bj941usa.iso.
    2. Click the appropriate file link to download the file from the Web page.
    3. When prompted, select a drive and directory in which to save the downloaded file, be sure to select a path that does not have a space in its name.
    Installing the update

    Follow the instructions provided in the corresponding txt file from above.

    • If you prefer to update your BIOS from within Windows, view 9bjy41usa.txt.
    • If you prefer to create a bootable CD to update your BIOS, view 9bj941usa.txt.

    Attention: Do not under any circumstance power off or restart the system during the Flash update procedure. Doing so will critically damage your system.

    Command Line Flashing Parameters
    1. Changing system information using the USB drive BIOS Package

      DOS Flash Program Options

      The default operation of the flash update program is a step by step dialogue with the user that presents choices and gathers responses from the user about which choices are desired.

      In some situations (such as a large enterprise with many systems that need updating), it may be desirable to create a flash update image that requires no manual intervention to perform an update operation. This can be done by modifying the batch file (autoexec.bat) calling the flash program with the following command:

      flash2.exe [option1] [option2] ... [optionX]

      [OPTIONS]
      /h Show help messages.
      /rsmb Preserve all SMBIOS structures.
      /ncb Program all non-critical blocks
      /clr Clear BIOS settings.
      /ign Ignore BIOS version check.
      /sn:nnnnnnn Update system serial number (up to 20 characters).
      /csn:nnnnnnn Update chassis serial number (up to 20 characters).
      /mtm:nnnnnnn Update machine type and model number (up to 20 characters).
      /tag:nnnnnnn Update system asset tag (up to 25 characters).
      /uuid The flash utility will generate an Universally Unique Identifier (UUID), replacing the one that is currently in the system.
      /logo <filename> Change logo. The size of logo file after compression should be less than 8KB (the size of compressed logo file is displayed on the screen during the processing).
      /cpu Update CPU microcode.
      /reboot Automatic reboot after all requests done.
      /pass:nnnnnnn Input current system password.
      • The following example shows how to update system asset tag number to "1234567" use command line:
        wflash2.exe /tag:1234567
      • The following example shows how to update BIOS and update system asset tag number by one command:
        wflash2.exe bios.rom /tag:1234567
      • The following example shows how to change the power-on logo.
        wflash2.exe /logo:myfav.bmp

      Note: A flash update image using these program options should be tested carefully before widespread usage.

    2. Changing system information using the Flash from Operating System version of the BIOS update

      Windows Flash Program Options

      The default operation of the flash update program is to use the graphical user interface provided by the AFUWINGUI program. You can also run the program from a DOS command box (with Administrator privilege) by running "flash.cmd". Before running the "flash.cmd", please change the command line to the options you need. The command is:

      wflash2.exe [option1] [option2] ... [optionX]

      [OPTIONS]
      /h Show help messages.
      /rsmb Preserve all SMBIOS structures.
      /ncb Program all non-critical blocks.
      /clr Clear BIOS settings.
      /ign Ignore BIOS version check.
      /sn:nnnnnnn Update system serial number (up to 20 characters).
      /csn:nnnnnnn Update chassis serial number (up to 20 characters).
      /mtm:nnnnnnn Update machine type and model number (up to 20 characters).
      /tag:nnnnnnn Update system asset tag (up to 25 characters).
      /uuid The flash utility will generate an Universally Unique Identifier (UUID), replacing the one that is currently in the system.
      /logo <filename> Change logo. The size of logo file after compression should be less than 8KB (the size of compressed logo file is displayed on the screen during the processing).
      /cpu Update CPU microcode.
      /reboot Automatic reboot after all requests done.
      /pass:nnnnnnn Input current system password.
      • The following example shows how to update system asset tag number to "1234567" use command line:
        flash2.exe /tag:1234567
      • The following example shows how to update BIOS and update system asset tag number by one command:
        flash2.exe bios.rom /tag:1234567
      • The following example shows how to change the power-on logo.
        flash2.exe /logo:myfav.bmp

      Note: A flash update image using these program options should be tested carefully before widespread usage.

    Obtain instructions for extracting a diskette image or if you are extracting this image under Microsoft Windows NT, 2000, or XP

    Previous versions
    FileVersionRelease dateDescription
    9bjy41usa.exe 9BKT41A 06 Mar 2012
    Flash UEFi BIOS update (Flash from operating system version)
    9bjy41usa.txt 9BKT41A 06 Mar 2012 Installation instructions for Flash UEFI BIOS update (Flash from operating system version)
    9bj941usa.iso 9BKT41A 06 Mar 2012 Flash UEFI BIOS update (CD ISO image version)
    9bj941usa.txt 9BKT41A 06 Mar 2012 Installation instructions for flash UEFI BIOS update (CD ISO image version)
    9bjt41usa.zip 9BKT41A 06 Mar 2012 USB drive UEFI BIOS flash package
    9bjw41usa.exe 9BKT41A 06 Mar 2012 Windows BIOS Setting Tool


    If you are unable to find what you are looking for, please do try the following options:
    1. Lenovo Assisted Search
    2. Product usage and general troubleshooting tips
    3. Lenovo Support Forum
    4. Technical Support Call Centre

    Country Availability
    AvailableWorldwide
    Document ID : DS014943
    Legacy Document ID : MIGR-75687
    Last Updated :
    Copyright © Lenovo 2013, all rights reserved
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