I have a toshiba satellite p35-s611 with a gig of ram, now everything runs smoothly until all of a sudden outta nowhere it shuts down!

I checked out toshiba support page but nada, until I googled "toshiba satellite overheating issues" I found a thread that stated to use a vacuum on the intake fans so I did. I was surprised on how much dust can accumalte in there!!!
So what brand of notebooks do you prefer and tell us from experience who is the best.