If you mean you have a backdrop behind the text of the icons when you have not selected them...
1) Go to "Control Panel".
2) Go to "System".
3) In the "System Properties" window, click the "Advanced" tab.
4) In the "Performance" section, click "Settings".
5) Check the box next to "Use drop shadows for icon labels on the desktop" (it is near the bottom of the list) and click "OK" for all three windows.
The backdrops will go away unless you select an icon.