With the latest updates to Windows 10, one of Microsoft’s claims is that Windows shuts down and faster now. While it does startup quicker when you turn it on it is not as a result of speeding up the shutdown process, but no longer actually shutting down. Windows by default now goes in a sleep state when you choose shutdown instead of a powered down state.
A sleep state is where Windows saves an image of what all is in memory and turns off power but has not shut down all the items running. Then when you turn the computer back on, Windows does not go thru starting everything from scratch but puts everything back in memory as it was when it was shutdown (actually went to sleep). You will find your browser opens all tabs that were open previously (and no prompt about if you want to restore tabs as Chrome does when tabs open when it closes.
If you want your computer to actually shutdown when you choose to shutdown (in the Windows world words mean different than in real world, see start for stop) there is a few steps you can do to get the prior way of operating.
Click on start button then choose control panel (the gear shaped icon above the power icon). Then choose the System icon. Choose Power and Sleep in the list on the left. Under Related Settings choose Additional Power Settings. Click Choose what the Power Buttons Do.
Now click Change Settings That Are Currently Unavailable. Uncheck Turn on Fast Startup.
Click Save Changes and you can close Control Panel.