WK = Windows Key

WK + d = Show desktop (do it again to restore all windows to their previous state)
WK + e = Open new Explorer window
WK + l = Lock computer
WK + r = Open Run dialog box
WK + TAB = move through the open applications o­n the taskbar
WK + m = Minimise all windows (but WK+d works better as it’s more like an o­n-off switch)
WK + f = Open the find files window
WK + u = Open the Utility Manager (if ever you feel the need!)