Ever since this morning, my MacBook has been continuously freezing. It gets the multi-colored wheel and either takes a while to unfreeze just to freeze up again or it doesn't unfreeze at all and I need to shut it off. It does this whether I'm trying to get on the Internet, or TextEdit, or anything at all. I honestly have no idea what to do. I've tried a few things to clear some space but it didn't make any difference. Can someone please help me out?