I have vista home premium in na e-machine computer i bought last year brand new.i can log on fine but alot of times it will come up and say it has stopped resonding. what aand why does this happen, what makes this happen? there is no specific time or thing that i have noticed to make it happen , its just random weather it clicking on the search tap at the top or pushing send on an IM, its VERY aggervating and dont no what to do about it. Its already been completly erased and reprogramed. what could be the problem?