Up until Win7 the Win32 subsystem wasn&#x27;t entirely in userland. In Vista they started the MinWin kernel initiative to extricate it but I don&#x27;t know if that&#x27;s full come to fruition in Windows 10.<p>If it has then you could theoretically write a WinNT interface for Linux and run the Win32 userland on it. But that&#x27;s pretty much asking Microsoft to sue you into oblivion.<p>* According to Wikipedia, the MinWin project started after Server 2003 shipped.