I first had troubles when I tried to print something, my screen froze and I was forced to restart. I had gotten it to restart and successfully print what I had tried to print before, but when I tried to open up Safari or iChat it began to freeze up again. I tried a few force quits but it kept on occurring to the point I was force to restart. This time, the Apple icon appeared as it tried to boot up but it showed no progress, and about 10 minutes later it turned into a white circle with a slash in it. I've been trying to get it to work for a while via my Leopard disc but I can't get that to read. Now, instead of the circle with the slash I get a message in several languages telling me to reboot. Any ideas?