If you want to use Whatsapp,Viber,Tample Run and any other android apps and Games on your pc,This post for you.
For use android apps on your pc you need a android emulator on your pc such as-Blustacks Apps player,Virtual Box etc.But problem is you cannot use Blustacks in low configretion pc,you need at least 4GB Ram and this apps slow down your pc.In Virtual Box you cannot use all of your android apps smothly.So you need a software to use android apps on your pc smoothly and which not slow down your pc.