1. Download the PHBSYS-00846912-US.EXE file to a temporary or download directory (please note this directory for reference).
2. Go to the directory where the file was downloaded and double-click the PHBSYS-00846912-US.EXE file to begin the installation.
3. At the "Phoenix® BIOS Update Utility for Microsoft® Windows® XP" screen, click "Next".
4. At the "License Agreement" dialog, read the agreement, then, if you agree, click "I Agree".
   NOTE: Please wait while the update extracts the necessary files.
5. At the "VAIO BIOS Update Tool 1.0.01.10181" box, click "Update".
6. At the "WBFLASH" box with the message "Do you want to update the system BIOS?", click "OK".
7. Click "FlashBIOS" to begin the BIOS update.
8. At the "Phoenix WinPhlash for VAIO" Warning box, confirm that all other programs are closed, all peripheral devices are disconnected, and that the AC Adapter is connected to the notebook. Click "OK" to proceed with the BIOS update.
   NOTE: Please wait while the utility updates the BIOS.
9. At the "WBFLASH" box with the message "BIOS Update successfully complete", click "OK" to shutdown the computer.
10. After the computer shuts down, wait for a few seconds, and then power on the computer.

After the computer restarts, the installation of the BIOS update is complete.

This utility updates the Phoenix® BIOS to version R0090J0 and resolves the following issues:

• VAIO® system information displays the wrong size of L2 cache for Intel® Celeron® processors.
• The system hangs or restarts when attaching any USB 2.0 device.

• WARNING!!: Before installing this update, be sure the computer is running on AC power. If the installation of the BIOS is interrupted by power loss, the computer may not operate correctly or at all.
• Before installing this update, disconnect all peripheral devices.
• 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 to print out these instructions as a reference during the installation process.