Question: How do I get rid of the error message in Vista about 'Parental Controls' when I launch game?

Answer: If you are getting error messages about Parental Controls in Vista when trying to launch the game, GTA IV may be blocked by Windows Parental Controls/Family Safety and may need to be set appropriately..

Please see the following site for possible solutions and more info about Parental Controls in Windows:

http://windowshelp.microsoft.com/windows/en-us/help/585539d0-0862-41e4-9b39-53467648efc51033.mspx