To display Hibernate option in turn off Windows Xp

Hibernating is the process of shutting down windows Xp without clearing the RAM (Random Access Memory).During the next startup the system remains as you were using it when you hibernated it.

To display the Hibernate button in turn off dialog box (in case you used the welcome screen) just hold the shift button, and you will find a hibernate button, popping out.
Note that you will get the Hibernate button if and only if you have enabled hibernation in the first Place.