Folks, I wrote this tutorial hope it helps.

Whatsapp is an extremely popular messaging app, available on Android, Windows Phone, iPhone and Blackberry handsets. The app has more than 300 million active users around the world, sending up to 27 billion messages per day. It is a fully-featured alternative to SMS messaging, and allows messages to be sent worldwide for free.

This has led many people to look for a way to use it on their home PCs. No native PC version has been released, but the Android version can be installed on a home computer with a few simple steps.

More info: http://tectivoo.com/3-easy-steps-to-download-and-install-whatsapp-for-pc/