Still confused about why the new version of Windows is 10, instead of 9? Beyond the loosely defined numbering schemes that are all too common in tech, a note posted to Reddit could provide an answer. Reddit user cranbourne claims to be a Microsoft developer, and cites rumors that early testing with the name “Windows 9” ran into problems with code some third-party developers used as a shortcut to detect when apps are running on Windows 95 or Windows 98.