it's HOT please help!!!

cpu specs
Processor Genuine Intel(R) Pentium(R) 4 processor
Processor speed 3.00 GHz
Physical memory 256 MB RAM
Memory speed 400 MHz
Memory type Unknown, Synchronous
Form factor DIMM
BIOS date 04/05/2004
BIOS size 512 KB
BIOS version P15 (BF86510A.86A.0058.P15.0404050012)
Board model Genuine Intel(R) D865GBF system board

when idle temperature of my cpu is about 50c and when it's working temp shoots above 70C and sometimes above 75c i am afraid i may fry my pc can any one help me how to cool my pc.....CHEAP!!
i have on one fan installed in my pc that's over my processor
fan speed 3445rpm(average)
should i install more fans in my cpu will that help effectiveyl

 

what will probably help the stock heatsink the most is cleaning. Take a can of compressed air and shoot it in the heatsink over the CPU to clear out all the dust. Is that fan the only one you have? do you have one in the back?

 

I concur clean out the heatsink with compressed air (dont turn the can upside down and point it at urself though) Make sure that your cpu fan is seated properly on the cpu itself, im guessing its a 478 pin not LGA 775, sometimes over time the thermal paste does "burn" off and in that case you can buy some pretty cheap online or at a store like BestBuy, Also make sure cables are blocking upt he flow of air to your CPU. Compressed air can be bought at BestBuy or Staples (im sure other palces as well).

 

thanks guys for the help but it's too late i fried my pc i was playing sanandreas and my pc just turned blank now when i turn on the power it does not responds.............:cry

 

though i cleaned and everything........hey can a virus result in overheating

 

I have a clip on fan that is pointed at my tower that seems to help keep my internal temp a little lower. At any rate, it blows cooler air at the heated cabinet and that has to count for something.