How to Use WhatsApp on PC/Web??
From long time people are using Bluestack, Android Emulator or some hacks to use Android apps on PC. From long time WhatsApp users were waiting for “WhatsApp on PC”. Finally users got a good news, recently WhatsApp team launched the WhatApp Web client for PC. WhatsApp Web is a desktop extension of the WhatsApp account on your phone. Now you can use WhatsApp on PC and can chat with your friends and group with faster speed. All the messages are synced between PC and phone. You can take any action on PC and it will be synced to phone and vice versa.
At this time, WhatsApp Web is available only for Android, Windows Phone 8.0 and 8.1, Nokia S60, Nokia S40 Single SIM EVO, BlackBerry and BB10 smartphones.
Check/Install new WhatsApp Version
First of all check your WhatsApp version should be equal to or greater than 2.11.500.
To check WhatsApp version Go to Menu->Settings->Help->About
WhatsApp Version
If WhatsApp version is old; click on this link and download latest WhatsApp apk and install on your mobile/iPad/tab http://www.whatsapp.com/android/beta/WhatsApp.apk
Open new installed WhatsApp
After installation of new WhatsApp, open WhatsApp application
Now you will see a new option in WhatsApp Menu called WhatsApp Web(Menu->WhatsApp Web).
WhatsApp Web Option in WhatsApp Menu
Click on WhatsApp Web then scanner will fire up, scan the chrome URL https://web.whatsapp.com/
Now you can use WhatsApp on PC.
Note: Make sure you have internet on mobile, its a web client that use your mobile internet.