You guessed it, the 3-finger salute, better known as CTRL + ALT + DEL was a mistake, according to Bill Gates. He went on to say: “We could have had a single button, but the guy who did the IBM keyboard design didn’t wanna give us our single button.” Continue reading for the news report and more information.

“Why, when I want to turn on my software and computer, do I need to have three fingers on Control, Alt, Delete?” asked David Rubenstein, Harvard Campaign co-chair. “Whose idea was that?”

Laughing, Gates explains that the key combination was designed to prevent other apps from faking the login prompt and stealing a password.

“We were able to experiment with a lot of stuff, but more on the software side than the hardware,” he said, after admitting that pressing three buttons to log in to a computer amounts to a design flaw.

[Source]