can someone help? first of all. when i got home two days ago. my computer would not shut on or anything. well it would shut on, it just kept showing the options, and not booting up. so my dad re-did the whole computer. we restarted it from scratch with all the files errased and evertyhing, and it works perfect.. except the fact it KEEPS freezing. any ideas why or how to prevent this? it's at RANDOM times. not during the same sites or anything. and the only way i can turn it off is by the button. any advice?