Here is the one of the best prank for ur dummie friends



1. simply make the mouse cursor at right - up most corner. such that there is not mouse pointer on the screen



2. take a snapshot of the screen. ( use Shift+ Home then Print screen and Ctrl + C. Save in a .bmp file. )



3. Right click your task-bar . go to properties , Select Auto Hide Property.



4. From display setting make the desktop icon free(hide icons).



5. Set that .bmp file as your background Wallpaper