How to activate whatsapp account - Bluestack on PC (windows 7)

Hi, searching over internet and with help of articles, I installed bluestack and then installed Whatsapp on it. Now when I start whatsapp, it asks my phone number... but I already have whats app with that phone number. Can I activate it without phone number and run it on my computer under windows 7 (which I have already done) but now not sure how to use it ?

You can't activate it without phone number. If you have installed whatsapp on bluestack then simply give phone number , it will try and if that doesn't work then it will send SMS to your phone number, type in the whats app and it should start working.