VAIO Care is a built-in tool that provides access to your laptop's original factory software. Here is the official procedure to reinstall drivers through VAIO Care:
The key to getting your Sony VAIO Assist button to work is to for your model and operating system.
From this menu, you can recover your system, back up data, perform hardware diagnostics, or enter the BIOS settings menu.
Right-click the driver installer file, select Properties , click the Compatibility tab, check Run this program in compatibility mode for , and select Windows 7 or Windows 8 . Click Apply and run the installer as an Administrator.