Set up Windows user accounts for each person accessing the computer. For information on setting up Windows user accounts, click the appropriate link below:
Click Setup → Security tools.
Verify Parental control is enabled and click the arrow next to Parental Control.
Click Protect all settings with a password. Type your password into the New password and Confirm password fields and click OK.
You will now be prompted for a password when you attempt to access password-protected features or settings in the user interface.