Bill Gates once starred in a bizarre Doom promo to push Windows 95 back in 1993 — tech mogul wore a trench coat, wielded a shotgun, and shot a demon, saying 'Who do you want to execute today?'
…Throughout much of the 1990s, PC users would run games through DOS, with Windows seen as something to use for multitasking productivity tasks. With Windows 95, Microsoft wanted to change that; hence…