Just to make sure that anyone who comes across this particular rant when searching for help about the power off availability on Windows 8.1 gets help as well...
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There are MANY ways to shutdown Windows 8.1. People seem to have trouble with this one, so...
- Pressing CTRL+ALT+DEL and clicking on the power button at the bottom right. [VIDEO LINK]
- Right-click on the Windows Logo in the bottom left of the screen and choosing a "shut down or sign out" option (conveniently I imaged this above.) [VIDEO LINK]
- Launch the Charms bar, click on the Settings charm, and then select the Power icon. [VIDEO LINK]
- I've used this method, but it's a little long; at the Start screen, click on your account photo in the upper right corner and then select the Sign out option. Click your mouse or tap any key to get past the Lock screen. At the log-in screen, click on the Shut down button in the lower right corner. [VIDEO LINK]
- Just press the actual physical power button (not holding it down, just pressing it once and letting go to start the shutdown process.)
- For those that have a touchscreen (I don't usually) - perhaps this: open File Explorer and navigate to the Windows\System32 folder. Scroll down the folder's contents until you see a file called "SlideToShutDown.exe". Double-click that file, and the lock screen appears at the top half of the screen promoting you to slide your finger down to exit Windows. Just slide your finger to power down. To make this option more handy, right-click on the "SlideToShutDown.exe" file and select the option to Pin to Start. Now you have a Start screen tile that you can click on or tap whenever you want to shut down Windows. [VIDEO LINK]
- There is a power button at the top-right area of Windows 8.1 Update 1, the start screen menu, now. Click it, see your choices there. (You still click the username to the left of it for logoff type options.)