Alright guys, I think this should be the last of my Mac newbie questions. Sometimes I'll leave my computer on and return but find everything performing slow and my airport express disconnected (it also can't relocate the wireless signal). This has happened three times to me so far. The only thing I left on the computer to run was bit torrent both times. I also plug in a mouse that needs to be removed before booting up otherwise it causes my computer to not be able to boot up (I just get the DONG and a continous black screen.) I don't know if the mouse could be a cause or be harmful to my system either. What do you guys think is causing this? *I've only had my ibook since wednsday.