Bill Gates (Photo by Ramin Talaie/Getty Images)

Microsoft founder Bill Gates says the "control-alt-delete" command known by PC users worldwide was a mistake. He was speaking at Harvard last week when someone asked why he didn't go with something a little simpler.

Gates said the command could have been a single button, but the man designing the keyboard didn't want to give it to them.

The issue was never cleared up before the computers went to market and the "three finger salute" has been around ever since. 

The hour-long chat at the university delved into the rise of Microsoft, Gates's current philanthropic efforts, his friendship with Warren Buffett, and more. The Control+Alt+Delete part of the discussion comes in around 16:30 in the video below.