hello all i have a Asus notebook that is not quite 3 years old. And for the last 6 months or so it occasionallly freezes up on meand that is on mains power..But wen i got to battery power within 5 minutes it does this..wat could be the cause of this issue and how would i go about fixing it without going to a IT person. Any help would be much appreciated cos its really annoyig problem to have.