In Windows Vista, you may experience one or more of the following symptoms:

• The Hibernate option is not available in the Start menu power options menu.
• The Hibernate option is not available in the Shut Down Windows dialog box.

  Note: To open the Shut Down Windows dialog box, press ALT+F4.

• The Hibernate option is not available on the power button menu that appears on the secure desktop.

  Note: You can access the secure desktop’s power button menu when you log off from Windows Vista.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB929658.

Microsoft has a way to automatically fix this problem, click the "Fix It" image to go to the Knowledge Base page that contains the download.