"Lock Computer" allows you to leave yourself logged onto the Personal Computer but prevents anyone other than you from using it.  This can be very handy as you leave your office for periods of time.

1.  Press the Ctrl, Alt, and Delete keys all at the same time.
2.  A window box will appear.  Click on the option Lock Computer.

To unlock your computer, press the Ctrl, Alt, and Delete keys and enter your network password.