This policy setting manages whether or not Windows is allowed to use standby states when putting the computer in a sleep state.If you enable this policy setting Windows uses standby states to put the computer in a sleep state.If you disable or do not configure this policy setting the only sleep state a computer may enter is hibernate.
Policy path:
System\Power Management\Sleep Settings
Scope:
Machine
Supported on:
At least Windows Vista
Registry settings:
HKLM\Software\Policies\Microsoft\Power\PowerSettings\abfc2519-3608-4c2a-94ea-171b0ed546ab!ACSettingIndex
Filename:
Power.admx