After many issues with Vista on my home computer I decided to buy an IMAC. I found one for a fair price on Craigs List and brought it home. I then took all of my family photos off my old windows computer and loaded them on my mac. The mac was great but I was having problems with it booting up. I assumed that I had a software issue and after some research..repaired permissions etc. While in Best Buy the other day I started looking at back up Hard Drives to work with Time Machine..why not I decided, I have the program the drives are reasonably priced, so I bought one, took it home and backed up my drive. Next morning my imac is frozen and will not boot up after I turned it off. I took it to the apple store and.....you guessed it bad hard drive (replaced free under warranty). Saved buy Time Machine.