How To Blocking Access To Webpage

To specify Web sites that others can always or never see

1. In Control Panel, open Internet Options.
2. On the Content tab, under Content Advisor, click Enable. If you've already enabled Content Advisor, click Settings, and then type the supervisor password.
3. Click the Approved Sites tab, type the Internet address (URL) of a Web site, and then choose whether you want others to always or never have access to this site. 
4.  Repeat this process for each Web site that you want to set access for.

Note:
You can also open Internet Options by clicking the Tools menu in Internet Explorer, and then clicking Internet Options.

After click setting then you can set every rating level on each parameters, like for language, Nudity, sex and violence by sliding the to the right or left of slider on the below.