how to create ghost login in win xp

First, create a normal login.

Now, move your computer into an old creepy house. Under the light of a full moon, kill the normal login in a particularly gruesome fashion. Because of the psychic stresses, it will be unable to move on to the next plane of existence, trapping it here as a ghost login.

Strangely enough, this works only on Windows systems. For a Linux system, you have to sacrifice a penguin.

Whole enough of a discussion?