I have a late 2007 macbook. I was browsing in firefox today and I started getting the spinning rainbow wheel and the computer wouldn't respond for about 10 seconds while the rainbow wheel was up, then it would respond for like 3 seconds, then again with the wheel, no response. It did this a few times and I could hear the hard drive make some noise during the 3 second response periods. It wasn't a strange noise, just sounded like the hard drive would stop working while the computer wasn't responding and then start again while it was. So I held the power button, computer turned off, I turned it back on, all it shows is a gray screen and then a flashing folder with a question mark in it. my usb ports still work, at least they will still charge my phone. If I hold alt option key down I get a mouse cursor that I can move around but thats all. anything else I can try? I found this: http://support.apple.com/kb/ts1440 I assume it can't find the system software cause the hard drive is broken.