3 ms·Windows had that subsystem (osxss.exe) but for OS/2 1.x only.by sedatk 7y agoWindows had that subsystem (osxss.exe) but for OS/2 1.x only.jacobush 7y agoOS/2 Warp could run Windows apps but it had actually a Windows 3.1 inside of it. A bit like XP mode on Windows 7.JdeBP 7y ago... and not even all of that.