Hello friends, I bought this product from online site. After using this product it starts showing errors like it automaticlly restart and the compbook becomes so laggy. And the battery backup is very low. The 100 % battery renuied in only 30 minutes. So when I go through the customer care, they said that the software needs to be update and the battery will be replaced. They asking for money for the battery, I am shocked that the compbook is in the warranty. So they told me that they bring battery from Mumbai. So I had very bad experience with this product.