1. Download the SO-L15600C02K1.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 SO-L15600C02K1.EXE file to begin the installation.
3. At the "Sony® USB Mouse 1.56 Update Utility - InstallShield Wizard" box, click Next.
4. At the "Welcome" box, click Next.
5. At the "Start Installation" box, click Next.
6. At the "Setup Complete" box , click Finish.

The installation of the Sony® USB Mouse Driver update is now complete.

This utility updates the Sony® PCGA-UMS1/A USB Mouse driver and resolves the following issues:

• If the 101-key USB Keyboard is disconnected after switching users (Windows Fast User Switching), Windows Explorer may stop responding.
• If the Sony PCGA-UMS1/A USB mouse is plugged in after switching users (Windows Fast User Switching), the mouse icon may not appear on the system tray.

• Before installing this update, be sure to connect the Sony USB mouse to the computer.
• During the installation of this update, 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.