I couldn’t find a pre-existing article with that exact title, but I can give you a for finding and installing Windows 7 drivers for your Sony Vaio PCG-71315L (often part of the SVE151 series).
I can't fetch files directly, but here’s how to get drivers for the Sony VAIO PCG-71315L running Windows 7 and what to install: sony vaio pcg 71315l drivers for win7
If you are trying to reinstall Windows 7 on your Sony Vaio PCG-71315L, you may have run into a common headache: such as VPCEB series
, Sony often uses a different "product name" for support, such as VPCEB series sony vaio pcg 71315l drivers for win7