Labels: Content Filtering
MakeUseOf featured a free parental control application for Windows called Qustodio. The program is installed on all Windows machines, and settings are controlled from a central web site, which simplifies administration. The central control panel allows parents to restrict access to web sites based on various categories, and also allows restrictions on web browsing time. If your family uses Windows computers, and you're looking for a quick, easy, free way to implement parental controls on multiple devices, you might want to take a look at Qustodio.
Microsoft already offers Windows Live Family Safety, which is essentially the same thing as Qustodio, and is also free, and integrates nicely with Windows. We have used Windows Live Family Safety on our main family computer (running Windows 7) for a few years now and have had great success.