QUOTE(dikara10 @ Jul 13 2011, 08:42 AM)
Will it solve the problem? Btw, I am not really confident to open up the case since I never tried it before.

Yeap it will, my laptop never experience any overheating issue because I always monitor the temperature, and
if it seems to be a bit high, I open it up and clean it.
my friend's acer 4736G laptop always experience sudden shut down, like 10 times a day in summer!
I helped him to disassemble the laptop all the way, clean the vents, fans, heatsink, and now it's working fine,
no longer sudden shut down.
but if you are not confident kindly ask for help or maybe send to service center.