How to install the PC Companion suite from a Sony Xperia smartphone
The Sony PC Companion suite was specially designed to manage for Sony smartphones (Android-based) from a PC.
You want to install the Sony PC Companion suite on your PC, but the latter is not connected to the internet? Don't worry, here's how to installed it from your phone.
Go to Settings > Xperia
Tap on USB Connectivity
Tick the Install PC Companion check box
From there simply connect your phone to your PC using the provided USB cable and you will be prompted to install the PC Companion Suite.