I'd like to see a video of a Windows 10 machine that isn't a fresh install or purely used for one specific task like gaming, media or surfing etc boot in 3 seconds. I've used, bought and owned some very fast spec machines and nothing has yet booted to the desktop in under 5 seconds from cold. A quick look on youtube shows the fastest boot times people are showing is around 8 seconds, those are machines with really quick OEM logo screens during POST etc too. One guy has under 5 seconds after various "optimisations" and of course the fast boot modes enabled on his Lenovo Yoga and says he could get even lower if he disabled various system drivers but then the laptop wouldn't be fully functional...