The Windows 10 hangover is becoming a security problem

Windows 11 now runs on 78.8% of Windows devices after Microsoft ended support for Windows 10 on 14 October 2025, according to Lansweeper. Windows 10 still accounts for 16.9% of devices and no longer receives security updates, leaving newly discovered vulnerabilities unpatched. “There’s a temporary bridge that we need to consider when looking at these numbers.