finally i was install windows 7 proffesional. in four days my laptop is very fast. and somedays i wan to install internet explorer 11 and windows says you must restart your computer and i do it. after that when start up, i see wimdows update until finish. but i think why this laptop rather slow?? trying to open task manager and i see my ram is two gb and used 800 mb. i dont understand and trying to open recours monitor and.... oh my god 1.6 gb used for windows service host and any wi dows services! i dont know how to stop it. please reply