M using this laptop from my first year of engineering.ie 2012 .with windows 7 at that time.window is geniune y can upgrade it too.sound quality is dolby.batrery back initially was 4 hrs.but due to exhausting use of 4 years its still giving me 2.5 to 3 hrs.they had given ne 2 years extended warrenty by submiting the college id.but trust I didnt require once coz its durable.u will get graphics card as well .the name of graphics card is navadia.really I love this product.