Sign in to or out of Windows
When you sign out of Windows, all of the apps you were using are closed, but the PC isn't turned off. Another person can sign in without needing to restart the PC—but even if someone else turns off the PC, your info won't be lost.
You also don't necessarily have to sign out of Windows. You can lock the PC instead, and other people can still sign in to their accounts from the sign-in screen.
Watch a video about signing in and out. (To view captions in your language, tap or click the Closed captioning
"Sign in to" and "sign out of" mean the same as "log on to" and "log out from," respectively.
To sign out of Windows
Open Start by swiping in from the right edge of the screen (or if you're using a mouse, pointing to the upper-right corner of the screen and moving the mouse pointer down), and then tapping or clicking Start.
Tap or click your account picture in the upper-right corner, and then choose Sign out.
To sign in to Windows
Swipe up from the bottom edge of the screen (or press any key if you're using a keyboard) to dismiss the lock screen.
In the sign-in screen, sign in to your PC using the method of your choice.
If you want to sign in with a different account than the one shown on the sign-in screen, tap or click the Back button and choose an account. If you're prompted to press Ctrl+Alt+Delete, do so.
To pick a different sign-in method, tap or click Sign-in options to see the available choices.
You can also switch to a different user account without signing out of Windows.