

This technique can save considerable time off your start up but it’s a substancial increase on disk writes.

Instead, it just refreshes your RAM with the loaded image from the hibernation file and delivers you to the login screen. When you start the computer again, Windows does not have to reload the kernel, drivers, and system state.

When you shut down your computer with Fast Startup enabled, Windows closes all applications and logs off all users, at this moment saves the current system state to the hibernation file, and turns off the computer.
