Internet Porn Blockage

Ok...i'm getting so very frustrated with my computer right now. I am trying to use the parent internet blocking program and I can't seem to get it to do what I want it to do. I am trying to block all sexual content on my computer (ie porn or other things on the internet considered to be sexual in nature). In the internet options under content I enabled the parent thing and it gave me a huge list of things that I can and cannot allow. I checked the ones I wanted to allow like all violence and chatting and everything not porn related and checked not to allow all porn and nudity. I would have thought that would have been easy but apparently its not. For some reason even though I only checked not to allow porn sites, every time I go on ANY site a popup shows up and says something about that site possibly having sexual content on it and wanting a password...even if it is www.disney.com. Do I seriously have to type in every single site that is allowed by hand cause that could take hours. I literally just don't want any porn on my computer but I don't want to go through hours of having to select sites that are good and those that are bad. Isn't there a way where I can just have the internet automatically block only porn sites and not ALL sites?