Bill Gates · every age What was Bill Gates doing at 45? Started a company at 19, youngest billionaire ever at 31 Oct 2001Windows XP releasedSource: en.wikipedia.org See it at your age EarlierAt 44 LaterAt 49 Others at 45Mahatma GandhiHome to India for good at 45Marie CurieVisited Poland and was welcomed in WarsawMaya AngelouMarried Paul du Feu in San Francisco at 45