Upgrading Computers

A guy helped a friend buy a computer because he said he was the only "computer friend" he had. Recently he decided to buy a more powerful computer and again asked for his advice.
"I'm sorry," he told him. "I haven't kept up with computers much since your last purchase."
"Oh that's just great," he responded, "not only do I have to upgrade my computer, I have to upgrade my computer friend too!"