Yes, you can now access WhatsApp from your PC.
To use it from your PC, you have 3 options :
1. WhatsApp Web -
To use WhatsApp web you need a web browser(Chrome, Firefox, Opera, Safari etc.). Go to this link https://web.whatsapp.com from any of web browers you are using and scan the QR code. To scan this QR code you need to use your WhatsApp application on your phone by going through the option 'WhatsApp Web'; click on this option and you can now scan QR code.
To scan the QR code
On Android: Chats screen > Menu > WhatsApp Web.
On iPhone 8.1+: Settings > WhatsApp Web.
On Windows Phone 8.0+: Chats screen > Menu > WhatsApp Web.
2.WhatsApp Desktop Application -
It is similar to any desktop applications for social network. All you need to do is download this Application. Go to https://www.whatsapp.com/download from your computer’s browser or you can download it from Apple App store. One thing you need to keep in mind before using WhatsApp Desktop Application that your operating system must be Windows 8 (or newer) or Mac OSX 10.9 (or newer).
The messages you send and get are completely matched up between your cell phone and your PC, and you can see all messages on the two gadgets. Any move you make on the cell phone will apply to WhatsApp on your PC and the other way around.
3. By using Bluestacks Software - This method has been used before WhatsApp web's existence. Go to https://www.bluestacks.com/ download this app then Search your favourite android app(in this case 'WhatsApp') and follow the instructions.