Now to actually make the shortcut right click your desktop and choose New | Shortcut. Next, type this case-sensitive command into the dialog box
Code:
rundll32.exe powrprof.dll,SetSuspendState Hibernate
click next. Give the shortcut a name like Hibernate and click finish. From now on all you need to do to enter hibernation is double click the shortcut.
Also you can put this shortcut to Windows task scheduler so that system Hibernate can be achieved at a particular time automatically.