I have a MacBook I bought in June 2007, and last week the 120 GB Hitachi hard drive started making a clicking noise, which caused the computer to freeze up. Upon restarting, the computer would not boot from the hard drive. I replaced the hard drive with a 250 GB Fujitsu, restored all my files through Time Machine, and the computer was running fine. Five days later the new hard drive began making a chirping noise (slightly different than the Hitachi's noise). The computer began to freeze up, so I turned it off, again fearing the same end as the original hard drive. I let it cool off, restarted it, and eventually Mac OS X loaded, but I tried to enter my password and then it began to freeze again. That's as far as I got. I haven't seen any other posts regarding this same issue. Is there something wrong with the MacBook itself as opposed to the hard drives that apparently stop functioning properly inside it? My AppleCare ran out at the end of the first year. I'm very disappointed at this point with my first Apple computer, and while I can purchase a new MacBook, I would prefer not to, and may not buy another Apple because of this experience. What should I do? Does anyone know of similar experiences?