Ever wanted to try out an Android app but don’t have an actual Android device handy? Are u one of those who loves to play Angry Birds, Temple run, Fruit Ninja or other android games.....but sadly not having android…The BLUESTACKS is for u… With it u can run apps from your phone fast and full screen on Windows and Mac.
What BlueStacks does is fairly simple. It’s basically virtualization for Android. Install BlueStacks on your Windows machine and the software allows you to run an instance of Android right inside the app. From here the experience is just like having an Android device – except the phone calling thing.
It took 10 engineers two years to build the complex “LayerCake” technology that enable this to happen – but you get to experience it free while in beta
Of course, why you’d really want to run Android on your computer we’re not entirely sure, but we’ve no doubt it will float someone’s boat out there.
Over 5 million people around the world use top apps like Angry Birds Space, Kik Messenger, Where’s My Water and more on their laptops with BlueStacks. 
You can Download it from Official BlueStaks Website
New Update : How to Run Android Apps on Windows XP
>BlueStacks Releases App To Let You Run Android Apps On Your PC | Techcrunch