Sony PCG-NV170P VAIO User Guide (primary manual) User Manual page 150

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
To use the Application Recovery CD(s) for more information.
Connecting a USB Device for more information.
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