How do I turn parental controls On/Off?

From the Home screen select the Menu icon then choose Settings/Parental Controls.  To turn Parental Controls on, use the number buttons on the TiVo remote control to enter a four-digit password, then enter the same password again for confirmation.  When you turn off Parental Controls, the password is deleted and anyone can watch any show or channel.

When Parental Controls are on, a lock icon will appear on the Home screen next to the Menu icon.