 It is also available in Windows Server 2019.Microsoft announced WSL 2 on May 6, 2019, which features a completely new VM-based backend (based on a subset of Hyper-V features) in lieu of the prior system-call adaptation layer, planned for release through the Windows Insider program in June 2019.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first foray into achieving Unix-like compatibility on Windows began with the Microsoft POSIX Subsystem, superseded by Windows Services for UNIX via MKS/Interix, which was eventually deprecated with the release of Windows 8.1.