This new fast startup mode will yield benefits on almost all systems,
whether they have a spinning HDD or a solid state drive (SSD), but for
newer systems with fast SSDs it is downright amazing. Check out the
video below to see for yourself:
One thing you’ll notice in the video was how fast the POST handoff to
Windows occurred. Systems that are built using Unified Extensible
Firmware Interface (UEFI) are more likely to achieve very fast pre-boot
times when compared to those with traditional BIOS. This isn’t because
UEFI is inherently faster, but because UEFI writers starting from
scratch are more able to optimize their implementation rather than
building upon a BIOS implementation that may be many years old. The good
news is that most system and motherboard manufacturers have begun to
implement UEFI, so these kinds of fast startup times will be more
prevalent for new systems.
Of course, there are times where you may want to perform a complete
shutdown – for example, if you’re opening the system to add or change
some hardware. We have an option in the UI to revert back to the Windows
7 shutdown/cold boot behavior, or since that’s likely a fairly
infrequent thing, you can use the new /full switch on shutdown.exe. From
a cmd prompt, run: shutdown /s /full / t 0 to invoke an immediate full shutdown. Also, choosing Restart from the UI will do a full shutdown, followed by a cold boot.
Boot work is mostly owned by our Kernel Platform Group, but a number
of teams came together in Windows 8 to make changes across the OS to
support this new mode, plus other exciting boot changes that we’ll talk
about very soon. We’re really enjoying the boot performance of Windows 8
in our internal use, and are looking forward to you being able to try
it for yourselves so you can let us know what you think.
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