What the actual issue is on 90 percent of all calls to technical support/I.T. help desks, it is an acronym meaning "Problem Exists Between
Chair And Keyboard."
The use of this term became common when tech support people began to have a need to vent frustration on
arrogant callers who had, in fact, themselves caused the problem, yet continued to insist it was the computer's fault, or the techie's fault.
So you would explain to the user that it was a PEBCAK error, and then
walk them through how to fix it.
John (technical support person, just leaving
work, holding his head in his hands)...
James (technical support person just coming on shift, passes John on his way out)
James: "Rough
day today, John?"
John: "Yeah, 99 percent of my calls today were PEBCAKs...do they make Excedrin in one-pound tablets? I have a headache the size of
Texas!"