<ul><li>Decades-old versions of Windows are still in use, powering critical systems worldwide such as hospital elevators, ATMs, and train control systems.</li><li>Examples include a hospital elevator in New York City running on Windows XP, ATMs powered by both Windows XP and Windows NT, and display systems in German trains using MS-DOS and Windows 3.11.</li><li>Upgrade costs for these legacy systems are high due to the need for new hardware, regulatory challenges, and custom software rewriting, making them economically impractical to replace.</li><li>The reliance on outdated Windows systems is evident in sectors like healthcare, transportation, and printing, with some systems dating back to the 1980s, showcasing the enduring legacy of older Windows versions despite Microsoft's newer releases.</li></ul>

Decades-old Windows systems are still running trains, printers, and hospitals

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