Many VAIO laptops were made for Windows 7. If you are on a newer OS, try running the installers in Compatibility Mode (Right-click > Properties > Compatibility > Run this program for Windows 7).
Check your Device Manager . If you see an "Unknown Device" (often listed as SNY5001), right-click it and point the driver update to the folder where you extracted the Sony Shared Library or Notebook Control Device. sony vaio assist button driver download link
Download the latest version of available for your model. Many VAIO laptops were made for Windows 7
If you just download the driver and it doesn't work, it is likely because the dependencies are missing. Follow this sequence: 1. Identify Your Model sony vaio assist button driver download link