Great news all pc users can now have Blackberry messenger, Whatsapp, Instagram and any other Android Apps for free on there Pc using a simple Android Emulator called Bluestacks Follow the steps bellow
Here is a pic of my BBM on pc

Lets get started
DIFFICULTY: MODERATE
First download Bluestacks from the attachment bellow Or Click here to download

Launch it


Accept the License Agreement by clicking Next


Then allow the app to download and Install all the required components


After installation Launch the app and Search for your desired Android app (BBM, Whatsapp, Instagram etc) then download

That all
Enjoy BBM, Whatsapp etc on your PC
Dont forget to Like/ Tweet


If you are having problem with installation,  Ask your questions below

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Fankx bro

@jesse annan try this link

Can I use two OS; one partition for Win 7 and one for android

@jesse annan yes it's very possible