Microsoft recommends a unique user ID and password for every user. In order to switch user ID or log off one need to click to the 'Start' menu as shown in the video. Press the move button at the shut down menu as shown. In the sub menu you can see the Change user and Log off. The window will typically shut down and restart on change of user ID or Log Off. In case you need to leave your PC unattended you can press 'Lock' from the same menu which will refrain anyone from changing your desktop settings and use any of your folders.