Enable Hibernation In Windows Vista

If the hiberfil.sys file on the system partition is removed, the option to hibernate is not available. A common reason for the hiberfil.sys to be deleted is from running the Disk Cleanup Tool, as explained in the Microsoft article “The hybrid sleep feature and the hibernation feature in Windows Vista may become unavailable after you use the Disk Cleanup Tool” (http://support.microsoft.com/kb/928897/en-us ).
To create the hibernate file and re-enable hibernation, use the following command:
powercfg -h on
In Windows Vista, run the powercfg -h on command at a command prompt to enable the hibernate feature and the hybrid sleep feature.

Topic: Tips & Tricks, Troubleshooting, Windows Vista, Windows Vista Tips, Vista Tips
Tags: hibernation, Tips & Tricks, Vista, Windows Vista Tips
@John: You can also use, Local Security Method to Enable the Administrator Account
Visit the Local Security policy (MMC).
Firstly click on Vista’s Start orb, then in the Start Search dialog box type:
secpol.msc
You must include the .msc extension.
Drill down to Local Policy, Security Options
Double click Accounts: Administrator account status, and select enable.
Security settings > Local Policies > Accounts: Administrator account status > enable it.
@John: @madel: Okay, that is because your default account in Windows Vista is not the administrator account. You can enable hidden administrator account in Vista and then use that account to do whatever you want to do. Please follow the instruction to enable the administrator account.
Logon to Vista using your usual account.
Launch the cmd prompt – Make sure you select, ‘Run as administrator’
Net user administrator p£ssw0rD
Net user administrator /active:yes
Switch User, or logoff
Logon as Administrator Password p£ssw0rD
(Your password may be different!)
Detailed Instructions to activate the Administrator
Logon to Vista using your normal username and password.
Click on the Start button
Click on Start Search.
Type, cmd.
Right-click cmd, select ‘Run as administrator’ from the shortcut menu.
In the black ‘DOS box’, type the following at the command line:
Net help user
The idea of the last command is just to observe the options for Net User. In particular, examine the syntax to set the password.
The next instruction is the crucial command. I have chosen password = p£ssworD, you may want to choose different characters.
Net user administrator p£ssw0rd
Net user administrator /active:yes
Check the message : The command completed successfully
Switch User, or logoff
Logon as Administrator Password p£ssw0rD (Your password may be different!)
Do you have an answer to these responses? Your advice is useless if the computer says that we don’t have permission! I am the admin. Who needs to give me permission, the president?
Sigh…so how do I tell Vista that I am indeed the administrator on my bloody machine?
Attempted to run command but was told by the machine that I do not have permission to enable or disable (funny how I was able to disable just fine…) hibernation.
…how I hate Vista, let me count the ways.