When we buy this Dell Inspiron M531R Laptop we feel great at strating and Its works were fast and smoothly. After 6 or 7 months it will works slow. After some years it will hang very much and have virus. We want to repair it and Format. Our files our anything will direct clean. Therefore we want to copy all our data in pendrive . We take Laptops for less our work but when I take this laptop My work increase.And my money is wasting.