- Click Start, click Run, type regedit, and then click OK.
- Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows
- Right-click Windows, point to New, and then click Key.
- In the New Key #1 box, type System, and then press ENTER.
- Right-click System, point to New, and then click Key.
- In the New Key #1 box, type Shutdown, and then press ENTER.
- On the Edit menu, point to New, and then click DWORD Value.
- In the New Value # 1 box, type ShowHibernateButton, and then press ENTER.
- Right-click ShowHibernateButton, and then click Modify.
- In the Value data box, type 1, leave the default Hexadecimal option selected, and then click OK.
- Quit Registry Editor.
Source: http://support.microsoft.com/default.aspx?…kb;en-us;893056