My neighbors asked me one day to check their computer, because it was no longer working properly. After realizing that the problem was caused by some corrupted or deleted system files, I reinstalled Windows, but I could not find their cable modem installation disk among their CDs. After I asked them for it, they gave me a weird look, so I put my question in simpler terms.
"When you have bought this little box over here," I said, "they must have you given a shiny little round disk like this with it. I just need that shiny little round disk."
They said they kept all their "computer stuff" in the other room in a cupboard, so they went to search for it. After a few minutes, the wife returned with a power cable.
"This was the only thing we found," she explained, "but I hope it will be just as good."