I added the Win key in Preferences, Shortcuts, My profile, Windows - Cmd key -> Win. I restarted WIndows, restarted Parallels 17.1.1, but Win key by itself does nothing. Some Win key commands work (like Win+E, Win+L, Win+D, Win+M, but Win key does not work, nor does Win+I, Win+R....why does the Win key not always work?
