Well, sometimes you have to be careful about what kind of sites you go to, always read the description of the site before you click on it, that way you can know a little about before you don't know what your clicking on. And other sites that are owned by random people are not safe, but that depends on who's in charge and in control of the site. Most things on the internet that say there's no viruses on them, pretty much have viruses, but I reccomend setting up an official anti-virus software, or letting your parents help you set one up. (I use McAfee as my anti-virus program).