Hi everyone, I'm just writing this in the hope that someone can help me. A week ago my computer network was hacked, and we got a tech guy over to help us out, he used a disc on my external disc drive, and since then, it hasn't worked properly. I thought it was a problem with my disc drive but then I tried to plug my iPod in and it didn't work either. I have shut down my computer and started it up pressing Command + Option + P + R, and nothing happened. I have installed software updates, that didn't work either. If nothing else works I guess I'll have to take it in to get fixed, but I'm really not looking forward to a week without a laptop.