Inside your Desktop or Laptop computer is a cooling fan, this fan runs at several thousand RPM, and over time it sucks in dust particles in through the cooling vents of the case.  These dust particles over time will accumulate on the surfaces of the components inside the computer.

Dust leads to heat and heat leads to failure.

In a dusty environment with pets or lots of through traffic the inside of the computer can become clogged with dust and hair in a very short time.  When that happens your computer can end up looking ike the image below or even far worse.

We use computer safe compressed air to thoroughly clean the inside of the computer including the hard to reach places such as between the CPU cooler base and fan.