I see. So there is a choice of sounds with Win 7. That's clever. I'll leave it alone for now. The twang is a pleasing enough sound. I couldn't characterize the water hammer as pleasing, but it's not offensive.
I have a rotating exhibit of desktop background photos too, comprised of various landscape images. They're very nice, but since I do my own photography, I may likely at some point want to put some of my own photos on the desktop, like I did with Win XP. With XP though, I was only able to display one image all the time, until I manually changed it to another one. I wonder if I could arrange to have a series of my photos come up in rotation like these default photos do?