My computer is about 6 years old. (isn't this a massive tower?) And every year. I do a complete cleaning of it. If you click on the pics, you'll see why.
The vent holes are filled with dust. As are the fans and boards. Using compressed air, I blow all the vents and fans clear of dust.
You can see all the dust on the floor of the tower when I was done. Then a good vacuuming of it and back together as good as new!
Dust accumulation can cause over heating and premature death!
So make sure, once a year, clean your puter! Unless of course you like replacing your puter every few years.
And now that I've got my puter clean, and the Salon cleaned, I need to clean the driveway. Yes, we've gotten more snow! As of yesterday, 48.5 inches so far this season. Our normal season has a total of 54.5. And with over 2 months left of winter, I think we'll surpass that!