My pc close suddenly. And i start my pc again, there was a screen written that my pc is overheating and ask me to press enter to continue. How to cure this problem? How i know is which part of my hardware problem? Please help me to solve it.

"How i know is which part of my hardware problem?" Did it say "your PC is overheating" or "your CPU is overheating"? My guess is "CPU". Some people refer to the case & everything inside it as the "CPU" but that is incorrect. A CPU is a socketed chip that attaches to the motherboard. CPU & CPU socket Unplug the power cord, open the case & blow out any dust from inside...do NOT use a vacuum. Make sure all the heatsink/fans are dust free & all the fans spin freely...especially the fan on the CPU. This is what a CPU's heatsink/fan looks like: CPU heatsink w/fan

thanks for reply first, the dust so sticky cannot blow. i use cotton to clean it. But regarding the power supply, there was dust at the fan. I dont know how to make it out, will there cause problem?

Do you Smoke? Unfortunately dust from Smoke is hard to remove because it sticks to every thing. If you have Smoke dust in your PSU then you will need to have someone open it to clean it. As for detecting which device is heating up I recommend SpeedFan... http://www.almico.com/sfdownload.php

"Do you Smoke? Unfortunately dust from Smoke is hard to remove because it sticks to every thing" And the smoke that gets sucked into a PC is 2nd hand smoke. If it can cause that kind of sticky mess inside your PC case, imagine what 1st hand smoke does to your lungs?

i dont smoke, i know when i using the pc, the sound is very big, i think is fan sound. I still cant solve my overheating problem. The speedfan software dont know how to use

I using intel motherboard DP965LT, I think at BIOS i cannot read my temperature and change the fan speed. Maybe must use other way. Please help me check for it. Thanks