How to use and setup WhatsApp on Windows
Head to WhatsApp and download the Windows desktop application. Click Save when the box pops up.
The setup may run automatically, otherwise head to your downloads folder and run the file.
Now what you need to do is scan the QR code on the screen with your phone using WhatsApp. (Open WhatsApp, click Menu and select WhatsApp Web).
Once the QR code is recognised, the desktop app for Windows will be linked with your account and you’ll be automatically logged in. You can now use WhatsApp on your PC.
Note: Since the desktop app uses your mobile to sync messages, you’ll probably want to make sure its connected to Wi-Fi to avoid racking up any hefty bills for data usage.