Which laptop should i buy having corei3 processor?

Go for "Lenovo Essential G510" laptop.

Specifications:-

Core i3 (4th Gen)
4 GB DDR3 RAM
500 GB HDD
Intel HD Graphics 4600
1 year warranty

Price:- Rs 32800 @ Flipkart -> http://www.flipkart.com/...svmtruegma

You must go for Dell!

I think dell or maybe samsung