The Sony Vaio VPCEH25EN originally shipped with Windows 7 Home Basic 64-bit, so official drivers exist. However, Sony no longer provides support or downloads for this model (Vaio support was sold in 2014). Finding and installing drivers today is possible but requires caution.
Follow these steps exactly to avoid conflicts, especially with the dual graphics (Intel + NVIDIA Optimus).
After following all steps, your Device Manager should have zero unknown devices (no yellow question marks). Your Vaio should:
Search for Your Model:
Filter by Operating System:
Download and Install Drivers: