Hi just got a few quick questions. Last night I was in disk utility erasing free space, all of a sudden the computer just froze up, left it for half an hour, came back and it was still the same. Eventually had to switch it off, when I turned it back on I got a message saying I needed to restart, did that and got the same message. To cut a long story short i've been speaking to apple support and i've been told the HDD probably needs replaced. Which brings me to the questions, obviously since the internal components must be very small, not all HD's will be compatible, does anyone know of a list or certain cheap but reliable one's I could get a hold of that are compatible? Also if the HD is installed correctly, is it just a matter of putting the OSX Tiger discs in the optical drive and installing the operating system? Don't know if i'm coming across as naive, but i've never attempted this on a mac before, i've changed components in PC's and games consoles, but thats about it. My mac mini is an intel 1.66 core duo, 100 gb HDD Any help or advice would be appreciated. I'm in the UK btw.