Silverlight won't un-install with IE 10 installed. I'm un-installing IE 10 and KB2670838 first.
There is a security update for Silverlight, KB2847559, that must be un-installed to allow un-installation of Silverlight. I'm also going to un-install DeskScapes 8 and re-install it before I try again.
It turns out that the Silverlight security update, KB2847669, appears on the WU list of updates, but on the screen of "Uniinstall an update" it does NOT appear, and Silverlight will not un-install with it in place. So, I un-installed DeskScapes 8 and re-installed it and tried again.
Desktop Earth, my target dream, goes instantly to the black screen but there is no Earth, rotating or not. EarthligtsV2 by stephenvw installs and works for a second or two, but then I get the Windows Explorer double-crash and the animation goes away. Likewise, Planktonic by ChaNinja installs with animation for a second or two, then the double crash and the image stays but the animation stops. If you do this two or thee times, the double crash goes away but you can't get anything except the black screen until you reboot. Rebooting with the Rotating Earth dream in place has no effect.
It appears that DeskScapes 8 is operating properly and that there is nothing wrong with the dream files, but that the animation is crashing. I suspect that some maintenance operation left it without enough stack/heap/whatever space to deal with the size of a full-screen animation, no matter how slowly and carefully planned to avoid consuming computer resources.
I'm out of ideas. I'll go back to a simple slide show desktop until this sorts itself out. I'll try again about once a week to watch for progress. Anyone with ideas pleas post here; I'll get an e-mail when anyone posts to this Topic.