The app requires you to keep mobile WhatsApp running on your phone, exactly like the Web version does. Once this is done, you can start chatting directly.The Desktop version is only a wrapper for the web version. On your phone, open its menu by pressing the button with 3 dots and select WhatsApp web to scan the QR code on your computer screen using the phone's camera. It shows a QR code, which you need to read using the mobile WhatsApp app.After a few seconds, WhatsApp's shortcut will appear directly on the Desktop and in the Start Menu, and the app will open:
Double click it to run and install the app.Point your browser to this page and download the installer for Windows 10 and Windows 8.The installer of WhatsApp for Desktop as of this writing doesn't check the operating system version and can be launched in Windows 7 too.
