About this download

This program will upgrade BIOS to Ver.R0122S5 and resolve the following symptoms.
 1. The size of "Total Memory" in BIOS Setup menu is changed from the available memory size to physically installed memory size.

Note: This upgrade program is suitable for both Windows XP operation system and Windows Vista Operating System.

Available Downloads:
BIOS Update Program Ver.R0122S5
File name: EP0000149537.exe
File size:  1.09 MB (1,152,504  bytes)

File Info

File Name

  • To install BIOS Update Program Ver.R0122S5

File Version

  • R0122S5

File Size

  • 1.09MB

Release Date

  • 2008-04-13

System Requirements

  • Windows XP
  • Windows Vista SP2 32bit


IMPORTANT: Before proceeding with the upgrade, disconnect all external hardware devices, including PC Cards etc.
Note: Before proceeding, ensure that the VAIO computer is operated using the supplied AC adapter.
Note: Save all data/files and close all running programs.



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 EP0000149537.exe.
3. Follow the instructions displayed in the installation wizard.
4. After installation is completed, please restart the computer.
5. Please load default BIOS setting values after updating.

To check if the updating is successful
1. Press F2 while booting and enter BIOS setup.
2. Enter BIOS setup and check that the  BIOS Version is R0122S5.