I gave my daughter a laptop that I had barely used. She's had it less than a year, but her kids are on it all the time. Now she tells me that when they turn it on, after a few minutes it powers off again. Does anyone know why it would do this? I don't think it's the battery because it's had less than a year of use. I don't much about computers, just average stuff to get me by. Any help would be really appreciated. Thanks.