If you want to increase the performance of speed and learn ability of window command then use some of window 7 key tips and tricks.............
1)Press Win+Left Arrow and Win+Right Arrow dock the window to the left and right side of the screen
2)Press Win+Up Arrow and Win+Down Arrow to maximize and restore/minimize the window.
3)Press Win+M minimizes everything
4)Press Win+D goto desktop
5) Alt+Up, Alt+Left Arrow, Alt+Right Arrow navigate to parent folder, or browse Back and Forward through folders in Explorer
6)Win+Home minimizes/restores all open windows except the active window
use these tips and plz like it..