Again let me reiterate, it has nothing to do with Stardock or any Stardock product. My netbook is running Windows 7 Professional 32-bit, and has never had a Stardock product installed on it, yet the text in the search area is there. It is a Micorsoft update that caused this issue to occur, nothing else.
Personally though, I don't see what the big problem is, does not matter to me if the text is there or not. 
So all that said, as far as getting rid of it, you can't unless you hack the operating system files I would imagine.