What Does This Do?
This utility updates the Memory Stick Controller Driver to version 2.0.4.3 to resolve the following issues:
Files may not copy correctly to the Memory Stick® media
Microsoft® Windows® XP operating system may restart when inserting or ejecting Memory Stick media while SonicStage® software is starting.
The computer may stop responding when playing a file from Memory Stick media in Windows Media Player.

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.
Download the TIDMSC-00605917-US.EXE file to a temporary or download directory (please note this directory for reference).
Go to the directory where the file was downloaded and double-click the TIDMSC-00605917-US.EXE file to begin the installation.
At the "Texas Instruments® Memory Stick Driver for Microsoft® Windows® XP" screen, click "Next".
At the "License Agreement" dialog, read the agreement, then, if you agree, click "I Agree" to continue with the installation.
NOTE: Several setup boxes may briefly appear during the installation. As the files are installed, these boxes will close automatically.
At the "Finished" box, click "Finish".
The installation of the Memory Stick® Driver from Texas Instruments is complete.

This utility updates the Memory Stick Controller Driver to version 2.0.4.3 to resolve the following issues:
Files may not copy correctly to the Memory Stick® media
Microsoft® Windows® XP operating system may restart when inserting or ejecting Memory Stick media while SonicStage® software is starting.
The computer may stop responding when playing a file from Memory Stick media in Windows Media Player.

http://esupport.sony.com/US/p/swu-matrix.pl?upd_id=1959