hi just built new pc and i was wondering how i can maintain and stop it from slowing down and just keeping it at its great performance. are there any tips of tricks or software. i keep an eye on the processes and stop unwanted background and startup software. is there anything else like cleaning the pc. install alot of games and that so i was wondering if they leave stuff behind after unistall. so please could someone just tell me how i should look after my pc. thanks by the way what about defraging my hard drives, is it safe.