However, after a clean installation of Windows (e.g., upgrading from Windows 7 to Windows 10 or 11), that button often becomes unresponsive. You press it, and nothing happens. The culprit is almost always a missing or corrupted .

https://www.sony.jp/support/vaio/download/ (Use browser translate, search your model + “Event Service”) sony vaio assist button driver download link

: Includes the "VAIO Event Service" which listens for button presses. VAIO Care : The actual application that the button triggers. Functionality Overview However, after a clean installation of Windows (e

Please note that these links may change over time, and it's always recommended to visit the official Sony website or other reliable sources for the latest driver versions. https://www

Sony no longer provides a single "Assist button driver." Instead, you must download the software and related Sony Shared Library components for your specific model:

In Windows, pressing the Assist Button while the OS is running usually opens —a dashboard showing system health, update status, and troubleshooting tools.