HibernateÂ is a power-saving state designed primarily for laptops, and might not be available for all PCs. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk to the hiberfile (C:\hiberfil.sys), and then turns off your computer. Hibernate uses less power than sleep and when you start up the PC again, youâ€™re back to where you left off (though not as fast as sleep). Use hibernation when you know that you won’t use your laptop or tablet for an extended period and won’t have an opportunity to charge the battery during that time.
Fast startupÂ requires that hibernate be enabled. If you only want to use fast startup and don’t plan on using hibernate, then you canÂ specify the hiberfile type as reducedÂ to significantly reduce the size of the hiberfile (C:\hiberfil.sys) to about half of its full size.
If you want to useÂ hibernate, then be sure toÂ specify the hiberfile type as full.
This tutorial will show you how to enable or disable hibernate and restore or delete the hiberfil.sys file in Windows 11.