1) windows + E = open my computer with windows explorer.
2) windows + R = open RUN dialog box.
3) windows + U = open utility manager.
4) windows + D = display the desktop
5) windows +F = search for a file or folder.
6) windows + L = lock computer.
7) windows + M = minimize all the windows.
8) windows + Esc = display or hide start menu.
9) windows + ctrl +F =search for a file or folder.
10)windows + pause break =display the system property.
11)windows + F1(or just F1 ) =open help and support .
12) shift +del =delete something directly.
13) Alt +ctrl + del =get task manager instantly .
14) Alt +Tab =quickly switch between running programs.
15) Alt + Enter =quickly getting full screen of command prompt.