By default Parallels maps the windows key to the command key. Unfortunately, that binding seems to be PERMANENT. I tried going to the preferences and unchecking that key binding in the Keyboard and Mouse prefs... I even tried using the little "minus" button to remove the binding entirely... but that didn't work either. I really want to use command+tab to switch between applications but every time I do that it switches to the Start menu (which it counts as an application) and then back to the Windows app I was already in....