Is the Assist button failing to work , or when the PC is turned off ? Share public link

To find the correct link, you must know your specific model number. Do not simply search for "Sony VAIO."

The website vaio-drivers.com (not affiliated with Sony) maintains a massive archive of original Sony drivers. For the Assist Button, search for:

I cannot host files, but here are you can search for using the model-specific keywords:

The on a Sony VAIO laptop is a dedicated physical key that provides instant access to the VAIO Care software, which is used for system maintenance, troubleshooting, and recovery. If this button is unresponsive while Windows is running, you typically need to download and install the Sony Firmware Extension Parser (SFEP) Driver and the VAIO Care application . Direct Download Link & Official Support