Once you have the VPC model name, you can find the official driver packages:
If Windows Update misses some, look for these (based on typical SVE151 specs): drivers sony vaio pcg 71911m drivers
Without Sony Utilities, brightness and volume keys may not work. Once you have the VPC model name, you
Most PCG-71911M models rely on 2nd-generation Intel Core processors with integrated graphics. Without this driver, your screen resolution will be locked at a low resolution, and external HDMI ports will not work. drivers sony vaio pcg 71911m drivers