WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other!
Whatsapp has just released Windows and Mac application for PC. This i think was one of the most requested stuff for whatsapp and now users can use it.
How do you install Whatsapp on Windows or Mac?
Just download here the application. When you first login to WhatsApp on the desktop, you’ll be prompted to scan a code from the mobile WhatsApp app on your phone. To scan the code from your phone, press the menu button in WhatsApp and tap WhatsApp Web. Here you can scan the QR code on your computer. Later, you can also view a list of all desktop or web clients that are logged into your account from this menu.
And you have installed Whatsapp on PC