Sorry, BUT YOU ARE SHOUTING.
This aside, 51 sounds a wee tad hot. Should not really be enough to cause a problem, but my CPU while browsing never goes above 42. and My system temp is 34...Could your CPU heatsink/fan need a clean?
Do you have pets (dog/cat etc), the system box on the floor, smoking makes it worse also, and a PC over 18months or so old? If so i would check for a gunked up fan.