A person who cannot do anything involving a computer even if you walk them through a simple task (ie sending an email or installing a game) even if you walk them through it extensively.
Once my friend broke his minecraft trying to install mods. I told him to send me a windows remote assistance email so I can do the complete process in minutes. Took him 4 hours to send me an email containing "C:\users\joel\documents and settings\appdata\.minecraft\bin"
He is a shining example of someone who is computer retarded