Here is the verified driver list with source recommendations:
: A community-driven archive that provides instructions for accessing old Sony FTP links. You can often find pre-installed drivers by searching for your "VPC" model name at VAIO Library Driver Scape : Maintains a database of drivers for the VAIO PCG-71315L , including Chipset, Graphics, and Wireless LAN. Sony Legacy Support : For hardware manufactured before 2014, the VAIO USA Support Portal sony vaio pcg 71315l drivers for win7