Windows can't, you see, just blithely stop drawing a program's window when it's minimised. I think that's because you can't count on programs to redraw themselves correctly, or because they may freak out if one or more of their various window-drawing strategies is not correctly bit-bucketed.
WinNT and its descendants - possibly even Vista, though I'm not sure - move minimised windows to the undisplayable location -32000, -32000. Way up there, eight to ten metres above and to the left of your monitor(s), all of your "minimised" windows are hanging in the air.
This is just seperb!