To sleep shutdown or restart the Windows 10 machine
Method 1
Press the Windows start button or click on Start menu icon. There is a “Power button” icon at the bottom of the start screen just above "All apps". Click on it. It will show a sub-menu with three menu items named "Sleep", “Shutdown” and “Restart”. See the picture below. Click on the desired item.
Method 2
Press Ctrl+Alt+Del. In the appeared screen at the right bottom corner there will be "Power icon". Click on it. It will show a sub-menu with three menu items named "Sleep", “Shutdown” and “Restart”. See the picture below. Click on the desired item
To Logout, Lock and Switch user the Windows 10 machine
Press the Windows start button or click on Start menu icon. At the top of the Start menu there is a “Username” icon. Click on it. It will show menu with items named “Change Account Picture”, “Lock” and “Sign Out”. Below that it will list other users. See the picture below. Clicking on one of the user in the user list shown will switch to that user.