I've been terribly pleased with Windows 7's new feature that lets you shuffle top rated photos as a background. I just turned it on and it ran through all the drives on my machine and picked out the top rated ones, shuffling them automatically. All I had to do was derate something I didn't like.
I just installed a new hard drive for additional media and moved some things onto it. All of a sudden the Top Rated Photos Search can't see any images, not even if I browse to a file I know for a fact has hundreds of images in it. And it switches back to the Windows Desktop backgrounds even after I save.