What is a very good internet security to buy that has parental controls?

Please, I need one! A good protection with parental controls that will not slow down my computer!What is a very good internet security to buy that has parental controls?
With McAfee you have not only a firewall and antivirus, but with the parental controls, ';Users are denied access to specified web sites and are also granted or blocked access to web sites depending on their assigned age groups and associated keywords.';





McAfee also has different ways to maintain your computer in it. It's very good; I'd highly recommend it.What is a very good internet security to buy that has parental controls?
if you are using windows it comes with a parental control for xp open the following start/control panel/internet options/content tab/content advisor and select the options you want blocked for vista it's also in the control panel