Well,i ll clean out my laptop after the memtest86+ reaches 11 passes. i`ll go with my laptop to re-apply the thermal paste at a computer repair place and also i ll tell them to clean it . hmmm as far as the ram upgrade , i just inserted the new ram into the ram slot , i did check the compatibility on mhz or smth like that , i see that i have a kingstone 4 gb and some other card 4 gb from nanya technologyes if this matter to you .