Re: 'COM Surrogate is not responding' Alienware M17X-R4 (Tag removed)
Your computer has two Video Cards: the integrated (Intel) and the discrete (NVidia) graphics cards.
The Switchable Graphics feature allows you to choose whether to use the Intel or the Nvidia graphics card. In your case, you can toggle between them pressing Fn+F7.
The main purpose of this feature is to enhance battery life and is based on your preferences. The discrete Video card is capable of 3D rendering required for gaming, but you'll sacrifice battery life. The integrated one is ideal for everyday use (surfing the web, microsoft office, etc)