With administrative privileges you can log other users off from the computer, which frees up system resources, and you can send them a message from your session.
To do this:
1. Open Task Manager--> Press (CTRL+ALT+DELETE)--> Click Task manager
2. On the Users tab--> click the name of the user that you would like to log off or send a message to.
3. Click Logoff to log the user off from the computer--> or click Send Message to send the user a message.