ASSIST button on a Sony VAIO laptop is controlled by the software. To make this button functional, you typically need to install three components in a specific order: the Sony Shared Library VAIO Firmware Extension Parser (SFEP) driver, and the application. Download Links & Support Status January 1, 2021
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Because Sony sold its VAIO brand in 2014, official driver support has become more limited for older models. Drivers and Software updates for Personal Computers - Sony ASSIST button on a Sony VAIO laptop is
The laptop will boot into the VAIO Care Rescue Mode . Drivers and Software updates for Personal Computers -
Pressing the button launches the VAIO Care application for diagnostics and tune-ups.
Run the Sony Firmware Extensions Parser installation file. If the installer says it is not compatible with your version of Windows: