Dell — Dell laptop is not booting properly

Address:

Erode, Tamil Nadu

I am bearing dell laptop with code bct 6812..I think one year is not completed...I am encountering some problem in my laptop..The booting time of my laptop is very slow nearly it takes 2 mins..And the blank screen holds for few seconds...And i am unable to put my laptop in sleep mode..In case If i put the lap in sleep mode means it goes to some state that i am unable to switch on it again..It is not working like as in the beginning..Kindly provide me the solution... My mail is [protected]@gmail.com