today i saw that my pc contained the java runtime env 5.
i just uninstalled it, cleaned with advance system care 5.0and then updated to jre 7 update 2.
after rebooting all the problems are solved.
each thing is launching with approx twice faster now.
i am too happy. thanks to all for giving your precious advice and time.
but at all i could not imagine that the having older version of java can cause this much impact on system.
(this solution is taken from one of the post).