Bluestack is a program that generates an Android interface on your PC and turns your computer into Android machine, of course, as long as you are in the programme. It enables you to use applications built for Android on your PC.
Here are some screenshots:
In the attachments you will see: Bluestack's interface, Asphalt 8 Airborne, Asphalt 8 Airborne Gameplay, Bluestack Running in the background while I chat on mibbit(Proof that you can enter the Windows while BLuestack is running) and proof of WhatsApp working.
Download BlueStack from: http://www.bluestacks.com/
NOTICE: IT DOESN'T MATTER WHAT OPERATING SYSTEM YOU RUN, THE PROGRAM IS COMPATIBLE WITH BOTH MAC OS AND WINDOWS!