If your computer is connected to a domain, Parental Controls are not available.
You can choose which ratings systems Parental Controls uses to control games.
Open Parental Controls by clicking the Start button , clicking Control Panel, and then, under User Accounts, clicking Set up Parental Controls.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Click Select a games ratings system in the left column.
In the list of ratings systems, click the ratings system you want to use.