Applicable Models

IMPORTANT: This file is only for use with the models identified. Not all models are sold in all countries.

This information is for the following models:

  • VGN-TT230N
  • VGN-TT250D
  • VGN-TT250N
  • VGN-TT250TD
  • VGN-TT260Y
  • VGN-TT280N
  • VGN-TT290
  • VGN-TT290N
  • VGN-TT290T
  • VGN-TT298Y
  • VGN-TT299P
  • VGN-TT350TD

About this download

Benefits and improvements

This utility updates the BIOS to version R2021M4 for compatibility with the Microsoft® Windows® 7 operating system, adds support for the Intel® Virtualization Technology, and provides the ability to enable or disable this feature within the BIOS settings.

System Requirements

Operating Systems

  • Windows® 7
  • Windows® 7 64-bit

File Info

File Name

  • ISBSYS-70194055-US.EXE

File Version

  • R2021M4

File Size

  • 4.28 MB

Release Date

  • 10-13-2009

Before You Start


Important Notes

  • WARNING!!: If the machine password and user password are set in the BIOS setup screen, clear both passwords before installing this update. The passwords may be re-set after the update is complete.
  • WARNING!!: Before the install, be sure the computer is running from AC power. If the installation of the BIOS is interrupted by power loss, the computer may not operate correctly or at all!
  • During the installation of this update:
    • Do not turn the computer off.
    • Do not allow the computer to enter Standby or Hibernation states.
    • Do not start other programs.
    • Do not connect any peripherals.
  • Some models may not have the hardware required to use the Intel Virtualization Technology. For models that do not support this feature, the Intel Virtualization Technology is not displayed in the BIOS settings. For additional information, the Intel Processor Identification Utility
  • can be used to determine if the processor in your computer supports the Intel Virtualization Technology.
  • During the installation of this file, be sure that you are logged in as the Administrator or as a user with Administrative rights.
  • To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
  • It is highly recommended that you print out these instructions for use as a reference during the installation process.

Download & Install


Download and Installation Instructions

  1. WARNING!!: Before installing this update, be sure the computer is running from AC power. If the installation of the BIOS is interrupted by power loss, the computer may not operate correctly or at all!
  2. To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
  3. Download the ISBSYS-70194055-US.EXE file to a temporary or download directory (please note this directory for reference).
  4. Go to the directory where the file was downloaded and double-click the ISBSYS-70194055-US.EXE file to begin the installation.
  5. At the "User Account Control" screen, click "Continue".
  6. At the "BIOS" screen, click "Next".
  7. At the "License Agreement" dialog, read the agreement, then, if you agree, click "I Agree" to continue with the installation.
  8. At the "Finished " screen, click "Finish".

The installation of the BIOS Update is complete.