So finally, I got someone to help for this particular topic I literally mastered with!
lol... No problem dear. you can connect it as easily as having snacks while you are really hungry :P
Don't use Antivirus programs like AVG ( that troubled me a lot)
simply use Microsoft security essentials...
Brother , i am too in india, Changed the region to US, applied the proxy 117.135.139.179:8888 , but getting the same message "app not available " I am having lumia 520, can you please help me out!