If your original Windows 7 installation is still intact or you have the recovery partition, use the utility to reinstall original drivers.

The is a regional variant of the Vaio E Series 15 (model SVE151 ). Check the bottom label to confirm the full model number (e.g., SVE1511M1EW).

If you are trying to reinstall Windows 7 on your Sony Vaio PCG-71315L, you may have run into a common headache:

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:

The most frustrating part of a Windows 7 reinstallation on this model is often the "Fn" (Hotkeys) not working. This requires a specific installation order of Sony-specific utilities that go beyond basic hardware drivers: Drivers and Software updates for Personal Computers - Sony