I have been using sony laptop couple years ago.From the day of purchase I am regretting my decision.Despite of having nice configurations and looks the speed is pathetic.It hangs sometimes.The worst part is internet browsing.Despite of having 20mbps speed broadbband it will make you feel like you are having speed of 1 or 3 mbps.one more thing sometime back I equipped it with a very good antivirus, as I thought this will correct the issues but guess what nothing happened and even I fought with the shop owner from where I bought it.Sony is no doubt a pioneer in television, digital and video cams but sorry to say sony miserably fails when it comes to laptops