Hlo guyz I had purchased an hp laptop two years back and I am pretty satisfied with this. I have presently windows 8.1 os in it and it is running smooth. hp guys are also very helpful coz they had provided online help two times. it is pure value for money .the only area which needs improvement is its speakers which are not audible enough. battery back up is good, it runs for 3 to 4 hours easily . it is the best thing in its price.