Lenovo P780 .. KitKat 4.2.2 update.. Blackberry messager and Whatsapp not working

[AC Question]

I downloaded this android update (KitKat 4.2.2) software update for Lenovo P780 ... I was very happy .. until I realized that I am just screwing my lovely phone.
Now I am not able to use Blackberry messenger and WhatsApp . Every time I time to login, it says check your internet connection.
Also there is new Lenovo Security Tool which can not be force stop as its inbuilt now.
I don't now what to do... please help..