hey guys i got a Alu Imac the new Intel core 2 one and it was when i got ti stupidly quick. but all of a sudden it has really slowed down. iTunes and simple programs are crashing all the time and it takes almost twice as long to boot up and shut down. does anyone know why this could be? just use like every computer or could it be something like a virus or anything. this is my first mac so i am still a noob really. had it for about a month or two now. any help would be fantastic. thanks.