My parents used to think that there computers broke down because my sister was playing too many flash games.
They never cleaned it until i got on it and was like "holy fuck, its slower than my ipod".
Then my family in dallas(divorced parents) has the a computer that originally ran on windows 98. And its slow as shit. I keep telling them that they should get a new computer, and my father keeps going "we just need a new monitor" or "we'll get some more RAM"
I just facepalm when my grandfather understands computers better than my father who works in the COMPUTER industry.