Whenever Microsoft releases a testing build of Windows or service pack, a watermark is always shown on Windows Desktop. This watermark usually shows the build/preview versions of Windows.
I personally don’t like it to be displayed on my desktop as it hides some part of the wallpaper and sometimes doesn’t look good on Desktop wallpapers.
There are many methods available to remove the watermark from Windows Desktop. These methods include modifying system files and playing with registry. However, I was not interested to play with my system/registry files so I found a nice tool which works for me like charm on new release of Windows Preview 8.1. Here is the link for my blog readers:
Download Windows Blue(8.1) from http://windows.microsoft.com/en-us/windows-8/download-preview