I am just surfing the Internet and up shows up on the screen a white chain symbol on the screen. It looks almost like a infinity symbol. It shows up for a few seconds then it disappears. My wife was typing up a document for her University and it showed to her first. This was two days ago. I think this is the first time that this has ever happened to us. Not sure what to do at this point. I hope someone here can help me out with this. Thank you . Oh almost forgot. I have a late 2006 Macbook 2,1.