I clould not click on desktop

[karttik]

All the desktop icon are not clicked when i want to click it..and also onright clik not work but when i go to startmenu--->programs--> all are work as wll as computer icon also open .............but in desk top not work plz help me-----------

 

[Pyree]

Are you sure other people didn't play a prank on you by changing the wallpaper?