Is that a picture of your office? It’s beautiful! ;-)
It’s the Errdig Library,I just added a working clock.
Save the image to your hard drive that he posted, using a graphics program, convert it to the necessary extension for windows backgrounds, which is usually a “*.bmp” depending upon your version of windows.
Move it to the correct folder within windows and change the current desktop image/background to the new image.
Voila!