In the video below Emily Wilson, program manager of the kernel platform group at Microsoft, demonstrate the ability to take a machine from fully powered off state to booted up in just under 8 seconds. So, how do they do it? In Windows 7, all user sessions are closed, as are services and devices in the kernel session. Now Windows 8 will use a new fast start-up mode which is a hybrid of traditional cold boot and resuming from hibernate. The difference with Windows 7 is that the kernel session is not closed, it puts it in hibernation mode. By writing the kernel session to the disk, it does not have to be restored completely in every start-up. By doing this the giant of software has seen a great improvement time from 30 to 70%. The Microsoft’s goals with the new fast start-up mode is:

Effectively zero watt power draw when off A fresh session after boot Very fast times between pressing the power button and being able to use the PC.

If you still want to fully, fully shutdown, you’ll still have the option to revert back. But why would you want to do that, right? Watch the video and tell us what you think.

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