He built one of the biggest antivirus companies to date, and yet it's what happened after this chapter of his life that made him a legend.
McAfee once lived in Belize and allegedly got caught up with drugs and other illegal activities, but that's half the story.
Here's a look into who the man once was, what he became, and where he is now.
Trust us, it's a wild ride.
John McAfee was born in the UK in the mid-1940s. His parents moved to Roanoke, Virginia, when he was young.
His early life was likely tough for the young man. His father, who worked as a road surveyor, was an alcoholic. When McAfee was 15, his father committed suicide, a fact McAfee says he wakes up with every day.
McAfee went to Roanoke College, where he also took up drinking. But the younger McAfee was a shrewd entrepreneur at a young age. His first business sold magazines door to door, which he says made him a small fortune.