And this is what the shutdown screen looks like. Yeah, I know they're a bit grainy but Windows logos only use 256 colours. Try them out and see how they look; you can always uninstall them again if you don't like them.
Download Windows 95 version (232 K)
Download Windows 98 version (232 K)
Download Windows ME version (263 K)
All you should need is the correct version of Windows for your selected logos!
Just select the correct download for your version of Windows. Run the file you have downloaded and it will install itself. Should you dislike the results (how could you?!), just use Add/Remove Programs in your Control Panel to restore your original settings.
Download Windows 3.1 version (9K)
You need to be running Windows 3.1 (duh!) in VGA mode (not EGA or CGA).
Download the zip file and open it. Inside there is a file called README.TXT which contains installation instructions.