How to Install Android On Windows 7, 8 or Even XP [Internet and Google Playstore]

Here are the links to download virtualBOX which is used to virtualize a Linux environment over the windows platform in-order to run Android which is a linux based operating system.
Virtual box : Download

Next up is installing the Linux based android in the virtualBOX application, you can follow the detailed video guide on setting up the OS in virtual box.
Android Image : Download 

Here is a guide which shows how you can enable internet access in any of the guest OS in virtual box.