Hello, I have an early '08 intel iMac. (24in, 4GB RAM, 3.06 processor) I've never had an issue with it until the other day. It will often freeze up with the spinning pinwheel & my only recourse is to shut it down via the power button. Force quit doesn't work. Also, it will somethings hang during start up. I'll then have to use the option key to get to the desktop. I've done the hardware test..which comes up fine. Additionally, I reinstalled OS X. (disk 1 archive install where you can keep your home folders) This worked for about a day before freezing again. Any help would be greatly appreciated.