Sony officially discontinued its Vaio support division years ago. The original driver download pages have been taken offline. If you’ve just performed a clean installation of Windows, or if your Wi-Fi, audio, or function keys have stopped working, you are likely in "driver limbo."
Before searching the Sony support site, locate the specific model name using one of these methods: sony vaio pcg-71913l drivers
esupport.sony.com
Install these first. They help Windows recognize the motherboard and other internal components. Network (WiFi & Ethernet): Sony officially discontinued its Vaio support division years