I bought a refurbished macbook from the apple store about 2 months ago. I haven't installed anything new (aside from firefox) and it freezes more and more everyday. I don't get the spinning ball.. It completely freezes (cursor wont even move) and I have to restart. It froze once a few days ago and it has double every day. I think i'm at 5 times today! It happens when I use safari and firefox. on another note if anyone can guess why this happens..- when I open applications, my computer makes the sound of an ejecting disk. I'd appreciate any help I can get. I'm really bummed. I read good things about refurbished computers and then i get this! Thanks!