I have a 24" iMac (3gb RAM/Snow Leopard), that's about two years old. For four days it's been running sluggish, and giving me the "pinwheel" every minute. The HD would also make loud "whiring" noises, over simple processes. I did some reading and determined that maybe the HD was dying. I'm sure my warranty has expired, and I never bought into apple care, so I was hoping I could fix the problem myself. I went out and bought an external HD, with the hopes that I could use Time Machine to back everything up. I was able to boot the computer with no problems and run Time Machine, until the system completely froze with only 18gb of 250gb saved onto the external. I left it for a few hours hoping it just needed to catch up, unfortantely nothing happened and I powered it off. I was then stuck at the "white screen of death", and decided to try and run the Disk Utility off the Snow Leopard disk. I managed to get that to work, and when I verified the HD it said, it was failing, so I tried to repair it. After a few hours the system completely froze again. For now it's powered off, and I was just hoping I could get a few suggestions as to where I can go from here. I would really like to at least recover a few files, but at this point it doesn't seem possible. If someone can suggest a new HD I can buy, to replace my old one, or a way I can get into my system and recover a few things before I replace it, I would be much abliged!