Bring your desktop background to life with this free utility.
DreamScene is a program originally released as part of the Vista Ultimate Extras Pack that animates your desktop background. It was never released for Windows 7 but thanks to a new free application you can have it in Windows 7 both 32 bit and 64 bit.
(Windows XP users can download a similar though unrelated program here)
DreamScene uses video wallpapers to bring motion to your desktop. Wallpapers can be downloaded from deviantART, Wincustomize and dreamscene.org.
Some of the DreamScene's I downloaded had the .rar extension (basically, another form of a zip file). You'll need something other than Windows native file compression to unzip it. I've used a free program called 7Zip for years, it's a favorite of mine. You can find it and other suggestions in the Best Free File Archiver/Zip Utility category.
I didn't have any problems downloading and installing the program on Windows 7 32-bit following the directions on the site, and the DreamScenes I tried out worked fine once I got used to my desktop wallpaper moving. :)
Dreamscene works with both 32bit and 64bit versions of Windows 7.
Enable DreamScene in Windows 7 with DreamScene Activator | The Windows Club
via Tiny Hacker