Win key has the following functions:
Windows logo key +L key to switch users;
WINDOWS logo key +TAB key cycles between buttons on the taskbar;
Win +E starts "My Computer";
Win key +D key to quickly display the desktop;
Win +R key to execute "Run" command;
Win +U key to open the tool manager;
Win +M minimizes all windows;
Win +F key to search for files or folders;
Win key +F 1 key displays Windows Help;
Win +Shift+M will restore the minimized window;
Win key +Ctrl+F key to search computer;
Win +PauseBreak opens the system properties dialog box.