Doesn’t Understand The Prints-iples

(I work for a company that provides third party tech support to employees of other companies, mostly assisting with their PC and printer issues. I have just installed printer drivers for a caller. Up until this point, he has seemed a little lost, but not completely clueless. I am still looking at his computer screen through the remote connection.)

Me: “Okay, go ahead and try to print something so we can test this.”

Caller: “Okay.”

(A minute or so goes by, and nothing happens on the screen.)

Caller: “It still isn’t printing.”

Me: “Um… you weren’t trying to print from this computer.”

Caller: “You mean it isn’t also going to work on my other computer?”

Me: “…”