There are three startup modes in Windows:
Starting with Windows 8.x, the default shutdown and restart scenario has been updated and namedÂ fast startup. Fast startup begins with the shutdown process and includes writing data to disk similar to the hibernate process. A key difference is that all user sessions (Session 1) are logged off and the remaining information is written to the hiberfile (C:\hiberfil.sys). When you boot the PC from this state, Windows loads the previously initialized state by reading from the hiberfile, instead of running the full cold boot process in which Windows, drivers, devices, and services are initialized. This method speeds up the process of initializing the lock or Start screen.
In addition, the use of hibernate technology has been expanded to create a new default startup and shutdown experience that is much faster than a full boot.
The faster startup and shutdown sequence uses the hibernate infrastructure to place the PC in hibernate. Unlike a full shutdown and boot, the user session is closed and a hibernate is performed. As a result, the hibernate file is much smaller, ensuring that the hibernate and resume process is faster. This sequence also takes advantage of the parallelization optimizations.
This tutorial will show you how to turn on or off fast startup in Windows 11.