Whilst working as a web consultant one of the helpdesk guys told me about a call he had:
A woman phoned up saying that she couldnt use her computer yesterday but it works today and wanted to send it back, the helpdesk guy puzzled asked he why she didnt call yesterday so he could have talked her through any possible solutions. She said that she couldnt call yesterday as the phone was not working due to a power cut!!!
Funny part is that the helpdesk guy told he to carefully pack up the computer and send it back as soon as possible, worried the woman asked why?to which the helpdesk guy replied "Because she was too thick to use a computer" he got the sack a week later :)