Re: You probably can't turn EVERYTHING off but
Quote: "By default the power-off button in Windows 8.x and 10 puts the computer into a suspend state. It's not actually off."
Don't know about 8, as never had a copy other than a very early pre-release to have a look at (shudder).
In Win 10 doing a shut-down does power off the device, it's not a suspend (does by default for all the Win 10 Home machines I've set up so far anyway).
But, and here is the catch, Windows 10 uses a hybrid hibernation when you select shutdown, rather than being a 'proper' shutdown.
Basically it closes all the the running Apps and logs you out, just like a traditional shutdown would, but then hibernates the PC. The idea being that you've basically hibernated a running OS, that's already completed its initialisation processes, and so booting back up should be faster.
Within Windows 10, it's know as 'fast startup', which you can disable in settings. Disable this, and shutdown becomes a normal shutdown, and boot up, becomes a cold boot each time, rather then the restore from hibernation that it is by default.
I decided to disable fast startup (and hibernate) on my main PC at home, it's running on SSDs, the boot up time did increase, but only by a second or two.
I suspect, unless you're running on a slow HDD, the 'fast startup' option just isn't really needed.
Plus disabling fast startup reduces writes to the SSD, (as you are basically hibernating every time you switch off), so seemed like a good idea to turn off anyway from an SSD life point of view.