I have the white MacBook, I've had it about 2 years now. I was wondering if maybe I have too much on my hard drive and that is why my most commonly used applications have suddenly begun to close mid-use. I've never had this problem before and have recently uploaded quite a bit of music/photos to my MacBook, so it seems to be the only logical explanation for it? Or, I don't think I could've gotten a virus because 1. I'm very cautious about the files I download and 2. I don't think Macs are susceptible to most viruses. I could be wrong, though. Nonetheless, does anyone know of any solution for this?