if daily 5-6 hours running of PC is safe?i do not play game in my pc.just use internet and some times moviies.machine DG41wv intel mthrbrd,cpu core2duo,2gb kngstn rm 1333.if any problm comes in longivity issue if i run computer 5-6 hours?and how much is norml longivity like this way of running machine as i use?please help me bro.. .. ..