A very useless piece of shit that overprotective and over-controlling parents put on your computer because they're scared that you may put viruses on it, causing you to loose, in their own words, "very valuable information" that they don't want you to fuck up. You can't see hardly any innocent sites, like this one, or, for all you boys out there reading this, porn.
Parental controls also have time limits that say when you can be on the computer to when you can't. But, if you're using
Google Chrome, you can easily
bypass the fact that you can't download anything. But, unfortunately, you can't go to the blocked websites or not have shitty ass time limits. :(