Dictates whether or not Windows is allowed to use standby states when sleeping the computer. When this policy is enabled, Windows may use standby states to sleep the computer. If this policy is disabled, the only sleep state a computer may enter is hibernate. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Power Management\Sleep Settings\Allow Standby States (S1-S3) When Sleeping (Plugged In) (2) REG: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Power\PowerSettings\abfc2519-3608-4c2a-94ea-171b0ed546ab!ACSettingIndex