Icon Text not Transparent on Desktop
By: Arie SlobWhen the text under the icons on your desktop are not transparent, there are two things to check. First open System from the Control Panel, select the Advanced tab, and press the Settings button under the Performance header. Make sure that on the Visual Effects tab, the option Use drop shadows for icon labels on the desktop is selected. Also make sure that Smooth edges of screen fonts is checked, it is also needed.
If this still doesn't do the trick, right-click the desktop, point to Arrange Icons By and make sure that Lock Web Items on Desktop is un-checked.