Right click on the internet logo, select that thing the on the bottom of the list, a window will open. On top are seven tabs. Select the bottom-left one. Then click internet-restrictions and you will get a list containing thing you can block; for example, violence, drugs, weapons (warning: may block some knex instructibles), gambling, sexual material, etc. If you rather want to block IMVU or "this is not a drill you have won 1 million dollar" pop up ads, you can download the google toolbar or select the privacy tab where there should be something to block those pop ups. And finally, if you wan't to block just one or two webpages, select the privacy tab again and click "websites". Then enter the URL's of the websites you want to block. Hope this helps!