How to install WhatsApp on a PC
To get WhatsApp on your computer you first need to download and install BlueStacks App Player. This is a free program that emulates Android applications on your PC. You can use it to run many Android apps and games through a windowed interface on your computer. Don't worry, it's very easy to use, as you'll see.
The next thing you'll need is a mobile phone number. This is used to verify your account and the app looks at your mobile phone contacts to find out which are using WhatsApp. If you already have WhatsApp installed on your phone it won't work, since you can only run one instance of the app per phone number.