Shortcut Key For Next Desktop Background In Windows 7:
Three Ways to Change Next Desktop Background In Windows 7
1: Now a days keyboards having right click button in thier keyboard Click RIGHT CLICK BUTTON + N
2: Press SHIFT+F10+N
3: Right Click on Mouse and Press N
Note: Make Sure Desktop is selected
In The Same Way You Can Refresh , Just Change The Letter 'N' To 'E'