Whatsapp on the desktop for a Windows phone

1. Open the Whatsapp web page  https://web.whatsapp.com/ in Chrome and you will see a QR code.

2. Go to the application on your Windows phone and open up the menu. See picture

3. Select "whatsapp web" and a frame for capturing the QR scan code opens. If it does not, just select the + option and the frame will appear.  See picture 

4. Place the frame for capturing the scan code over the scancode shown on the computer screen. You will see your whatsapp screen on your computer screen. It will be connected as long as your phone is powered on and there is a wifi connection.