Has been working well for me. You do have to pay for it, but it is well worth it. It is quite simple to use and exactly what I was looking for for the kids computers. Simple to install and manage from one place.

Password protects only the browser settings. It can easily be deactivated or removed from the puzzle icon - even with a password in place

FoxFilter is a very efficient bad word blocking tool that avoid kids visit inapropriate internet content that they don't need to grow sweetly :)

excellent