That's win95 and 98, dude. logon.sys was actually a bitmap (open it with paint) and is the "Windows is shutting down" screen, and logos.sys is a bitmap that says " its now safe to turn off your computer" I forgot what the beginning screen is called, but you can rename any .bmp file to one of the above and have allot of fun freaking your little friends out.
Make a bitmap on a black background with text that says "NOW FORMATTING C:\ " and rename it logon.sys. It's safe fun.