John McAfee was a British-American computer programmer and businessman, best known for founding the cybersecurity company McAfee Corp. He gained fame in the 1980s for creating one of the first commercial antivirus software products, which helped protect computers from malware. In addition to his work in cybersecurity, McAfee was a controversial figure due to his eccentric lifestyle and legal troubles. He was involved in various ventures, including cryptocurrency and political campaigns, and he often made headlines for his outspoken views on privacy and government surveillance.