I'm new to the whole Mac world, I used G5 in college but never owned anything Mac before until October when I bought the iMac, so i'm very new to all this. So now I hardly use the computer, and I think my mom leaves it on all day and night. I tried to shut it down the other day and it wouldn't do it. I clicked it, waited a bit and nothing happened. Repeated a few times, nothing happened. I tried using the Force Quit option the other day, also to no avail. Same thing; wait a bit, repeat, nothing. I still haven't installed OSX Leopard yet, it came free with the comp but I never bothered to install it. I have some downloaded stuff on there so I'm thinking maybe it's a virus? And if so, what would you guys reccomend? If I install OSX Leopard will it erase everything off the disk? If not, what can I do that will? I'm starting to think that's the best option right now.