I'll play on it a for a while and it tells me I need to restart my computer, but it wont let me click anywheres, to go to restart. So I have to just turn it off. I don't know why this keeps coming up. I installed AIM earlier and this was the first time it came up, it didnt let it finish installing. So once I started the computer again I installed and kept playing. Now after a little while of messing around the computer it keeps popping up telling me I need to restart. I'm new to macs and I have no idea what to do.