Block bad : Free program works on a file hosts file To lock all the sites hide the harmful Ad Easiest way, and you can add any site to the black list to be blocked, in addition to the presence of a large number of malicious sites added to the program list the black will be periodically updated and the addition of the most dangerous sites that show, The program is free and does not need to install it is easy to use and relieves you of bother to use the software paid that affect Internet connection and weaken