Support for the POSIX subsystem was deprecated some time ago according to Wikipedia: > Microsoft's first foray into achieving Unix-like compatibility on Window

Support for the POSIX subsystem was deprecated some time ago according to Wikipedia: > Microsoft's first foray into achieving Unix-like compatibility on Windows began with the Microsoft POSIX Subsystem, superseded by Windows Services for UNIX via MKS/Interix, which was eventually deprecated with the release of Windows 8.1. There was also the possibility to run Linux software under Windows using coLinux.