Hello friends I am using dell inspiron 15 from last one year and this is one of the best thing I have ever seen. Its graphic is very good even you can play heavy games like call of duty fiffa 2016 easily on this laptop. and its battery timing is very good you can use five to six hours easily with out electricity. you can use any window xp window seven window crystal. and its cannot be hang caue I am usin it from last one year