XtraSimplicity

I had this problem, and couldn’t fix it, so heres how you do it.

Archived from:

http://www.howtogeek.com/howto/windows-vista/re-enable-hibernate-option-in-windows-vista/

If you’ve found that your Hibernate option is missing from Windows Vista, it might be from running the disk cleanup wizard and removing the hibernate files. This is due to a known bug in Vista that might not have been hotfixed already.

Turning it back on is very simple, however.

Type cmd into the start menu search box, and use Ctrl+Shift+Enter to open in administrator mode. You can also right-click the item in the menu and choose Run as Administrator.

From the command prompt, type in the following command:

powercfg /hibernate on

You’ll have to restart your computer before it will take effect.

Another method, is to do the same thing, but type

powercfg -h on

Instead of

powercfg /hibernate on