Finding the correct drivers for a legacy laptop like the (often also labeled under the VPC series, such as VPCEB3FGX) can be challenging. Because Sony has largely exited the laptop market and phased out support for Windows 7, many official download links are no longer active.
If Sony's official links are broken, trusted third-party repositories often host the exact files: Drivers and Software updates for Personal Computers - Sony
Comprehensive Guide to Sony VAIO PCG-71315L Drivers for Windows 7
Sony still maintains some "Support by Model" pages. Search for your specific VPC model number (usually found on a sticker near the screen or on the bottom of the laptop) instead of the PCG number. Check the Sony USA Downloads page .