How to use WhatsApp Business from a web browser on desktop Read on for our step-by-step guide to setting up and using WhatsApp Business on your desktop computer. Use the WhatsApp Business app for Windows.Luckily, WhatsApp Business has a variety of ways to do just that: If you already use WhatsApp Business on your mobile, you’re probably wondering how to access the same account on your laptop. It pays to be able to access WhatsApp Business accounts from a variety of different devices. When it comes to business comms, ease and efficiency are key. Dividing your attention between your phone screen and computer is always frustrating.