Keeping the inside of your computer clean reduces the amount of heat and extends the life of your computer. The number one service issue we come across in our shop is the replacement of computer fans that are not spinning up to speed and which create an excessive amount of noise. How often a computer needs to be cleaned depends on the environment in which it lives. The hotter a component gets the shorter the life span it will have. Dirt and dust will dramatically shorten the lifetime of your fans.
Dirty fans are more likely to cause disturbing noise.
In the long run regular computer maintenance saves you repair expenditures down the line. This type of maintenance is even more important for households or businesses that have smokers. The combination of dust and cigarette smoke produces a particularly stubborn pasty film that coats everything in its reach. As always when working on your computer, make sure you unplug it from the AC power source, unplug it from the wall. Take the cover off of the case.