Dell Vostro 1540 is the worst laptop if all time. I used this laptop. It stop working within 5years of purchase. The screen was filled with thin lines. The laptop hanged everytime right from switching it on till you switch it of. Then once it started to shut down automatically. I changed the battery. I repaired it in an Authorised Dell Service Centre. It costed me around Rs11, 000. But after servicing, again within 6months all the problem arised. So, I am very disappointed with Dell. Never buy Dell products. They are over priced compared to many other brands. Service centre qualities are not good even.