How to block porn completely from your computer

1. Every 15 year-old knows how to delete the internet history list (tools>>>clear private data) to keep you from seeing what they see. In order to stop this here is a list of free software you can use to keep their filthy minds back to watching cinemax.
2. Use PicBlock.
Pickblock blocks porn images by detecting the amount of flesh tones in images. Since the software is not based on offensive keywords list or known URLs, PicBlock may not be a substitute for your content filtering software.
http://www.download.com/PicBlock/3000-2017_4-10425744.html?tag=tab_pub&cdlPid=10857284
3. If you actually want to spend money, Check out getnetwise. This website is the best guide to blocking harmful content from your kids' eyes.
http://kids.getnetwise.org/
4. If you have Firefox add Foxfilter
https://addons.mozilla.org/en-US/firefox/addon/4351
5. You can also add ProCon Latte as a firefox addon to block even more website
https://addons.mozilla.org/en-US/firefox/addon/1803