Applicable Models

This information is for the following models:
  • VGN-TT25TN
  • VGN-TT15TN
  • VGN-TT16GN
  • VGN-TT36GD
  • VGN-TT16MN
  • VGN-TT25GN
  • VGN-TT27GD
  • VGN-TT16TN
  • VGN-TT25SN
  • VGN-TT26MN
  • VGN-TT26TN
  • VGN-TT15SN
  • VGN-TT17GN
  • VGN-TT26SN
  • VGN-TT16SN
  • VGN-TT15GN
  • VGN-TT26GN
  • VGN-TT36MD
  • VGN-TT35GN

About this download

This program will update BIOS version to R2021M4b and will resolve the following symptoms

1. The setting that controlled "Intel Virtualization Technology" was added with BIOS Setup. The system with the function of "Intel Virtualization Technology" is an object. The function is Disabled by default.
2. It takes time until the VAIO logo is displayed when TPM and BitLocker are made effective


Available Downloads:

BIOS Update version R2021M4b

File name: EP0000209902.exe

File size: 4.25 MB (4,464,640 bytes)

File Info

File Name

  • To install BIOS Update version R2021M4

File Version

  • R2021M4

File Size

  • 4.25MB

Release Date

  • 2009-10-01

System Requirements

  • Windows Vista SP2 64bit
  • Windows Vista SP2 32bit
  • Windows XP



1. Download the file to a temporary or download directory (Please note this directory for reference later).
2. Go to the directory where the file was downloaded and double-click EP0000209902.exe.
3. Follow the instructions displayed in the installation wizard.
4. After installation is completed, please restart the computer



To check if installation is successful:

1. Open VAIO Control Center -> System Information
2. Confirm BIOS Version is R2021M4