John,
Following is paraphrased from:
http://support.microsoft.com/kb/928897
The hybrid sleep feature and the hibernation feature may become unavailable after you use the Disk Cleanup Tool
This problem occurs when the Disk Cleanup Tool disables the hibernation file. The hibernation file must be enabled to access the hybrid sleep feature and the hibernation feature in Windows Vista.
When the hibernation file is disabled, and the hybrid sleep feature is enabled, a backup of open programs and open files will not be saved to the disk when you use the sleep feature in Windows Vista. Additionally, if the computer loses power while the Windows is in sleep mode, open programs and open files will not be recovered, and any unsaved work will be lost.
Enable the hibernate feature
Run the powercfg -h on command at a command prompt to enable the hibernate feature and the hybrid sleep feature.
Click Start, click All Programs, and then click Accessories.
Right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
Type powercfg -h on, and then press ENTER.
Type Exit to close the command prompt window.
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karl
All of a sudden I cannot get my Vista box powers options mode to go to
hibernate. It's simply no longer listed as an option. It once was. Also no
"Hybrid sleep mode" listed as well. Once was.
Looking over the web I see people use the cmd line with:-
powercfg -h on
When I do this I get a message:-
"You do not have permission to enable or disable the Hibernate feature."
I am the only user and I have administer status. What gives?
