Windows 8 does not directly select the Hibernate option by default and requires manual modification.
By default, the "Power" and shortcut Keys "alt+f4" menu do not have hibernation options, as shown in
1, open the Control Panel, to find the power options;
2, then select "Select the function of the power button";
3, click "Change the currently unavailable settings";
4, put the "sleep" option on the hook;
5, select "Power" or "ALT+F4" again, the sleep button has been normally displayed, the computer can be selected to sleep normally.