An anonymous reader quotes a report from Quartz: At the Bloomberg Global Business Forum today, Carlyle Group co-founder and CEO David Rubenstein asked Microsoft founder Bill Gates to account for one of the most baffling questions of the digital era: Why does it take three fingers to lock or log in to a PC, and why did Gates ever think that was a good idea? Grimacing slightly, Gates deflected responsibility for the crtl-alt-delete key command, saying, "clearly, the people involved should have put another key on to make that work." Rubenstein pressed him: does he regret the decision? "You can't go back and change the small things in your life without putting the other things at risk," Gates said. But: "Sure. If I could make one small edit I would make that a single key operation." Gates has made the confession before. In 2013, he blamed IBM for the issue, saying, "The guy who did the IBM keyboard design didn't want to give us our single button."