Sony PCG-SRX99 VAIO User Guide (primary manual) User Manual page 144

Troubleshooting the Mouse and Touchpad
My mouse does not work.

Make sure the mouse is securely plugged into the USB port. See

If you are still experiencing problems, use your supplied Application Recovery CD to reinstall the mouse drivers. See
Using the Application Recovery CD(s) for more information.
Connecting a USB Mouse for more information.
Page 144