Some people eat at their computers. Some smoke while computing. And some don't change the filter on their heating and air system as often as they should. Many of us never open up our computers to see what's inside, but that's the first thing your computer repair expert will do. If your PC is anything like these computers, the next thing he/she will do is take a picture. The Register has six pages of these dirty, filthy pictures. http://www.theregister.co.uk/2009/11/13/ventblockers/ -via Digg
When the new computer arrived, my husband and I offered to set it up for her and transfer her old files to the new hard drive.
When we opened up the Compaq, I had to leave the room to keep from vomiting. There was at least 3/4 inch of tar lumped on top of everything plus another inch of dust.
We weren't able to salvage much. And my mom wondered why the Compaq quit working.
Plus living in a very old house with wood floors and pets... dust and hair builds up quickly. I'm surprised some of those computers ran as well as they did lol.
My last computer the power supply shorted out cuz I hadn't cleaned it...