if you are trying to maintain the transparency on your desktop wallpaper … probably cannot be done … one of the limitations of windows os. what you
could do is open up your graphics program and copy/paste the
windows-logo.png in front of your favorite wallpaper … thereby, coming up with similar effect. save the image with different name … so you don't over-write a good bkgd image.
then, you'd be left with something similar to this: