Download the latest version of available for your model.
Finding the correct Sony VAIO Assist button driver is a common challenge for users who have upgraded their operating systems or performed a clean install of Windows. The Assist button is tied to the Sony VAIO Care software suite, and without the proper underlying drivers and system components, the button remains unresponsive. sony vaio assist button driver download link
The actual driver that identifies special hardware buttons. Download the latest version of available for your model
With the laptop off, press the Assist button instead of the Power button. sony vaio assist button driver download link